IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A phenomenon that occurs for large reverse voltages across a pn junction where the free electrons are accelerated to such high speeds that they can dislodge valence electrons.

a. Piezoelectric effectb. Zener Effectc. Recombinationd. Avalanche effect

ANSWER: d. Avalanche effect

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page # 985

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A graph showing the gain or phase performance of an electronic circuit at various frequencies.

a. Ogive graphb. Bode plotc. Gain-frequency curved. Performance graph

ANSWER: b. Bode plot

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #986

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

What do you call the ohmic resistance of the semiconductor?

a. Dynamic resistanceb. Static resistancec. Bulk resistanced. Semiconductor resistance

ANSWER: c. Bulk resistance

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #986

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

The metaphor used to describe the action of an SCR when it is used to protect a load against supply.

a. Surgeb. Limiterc. Breakerd. Crowbar

ANSWER: d. Crowbar

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #987

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A value that tells you how much to reduce the power rating for each degree above the reference temperature given on the data sheet.

a. Reduction factorb. Derating factorc. Temperature coefficientd. Attenuation

ANSWER: b. Derating factor

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #988

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is the process of adding impurity element to an intrinsic semiconductor to change its conductivity.

a. Impurificationb. Crystallizationc. Recombinationd. Doping

ANSWER: d. Doping

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #988

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A condition where the transistor is operating at the upper end of the load line with a base current that is one-tenth of the collector current.

a. Full saturationb. Hard saturationc. Mid saturationd. Avalanche

ANSWER: b. Hard saturation

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #989

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The pattern appearing on an oscilloscope when harmonically related signals are applied to the horizontal and vertical inputs.

a. Lissajous’ patternb. Shockley’s patternc. Braun’s patternd. Lee de Forest’s pattern

ANSWER: a. Lissajous’ pattern

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #991

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

7. Please Use One Page per Question. 8. Fill-out all needed information. 9. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A connection of two transistors connected with positive feedback to simulate the action of a thyristor.

a. Complementaryb. Latch c. Push pulld. Switch

ANSWER: b. Latch

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #990

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

7. Please Use One Page per Question. 8. Fill-out all needed information. 9. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It refers to the average amount of time between the creation and recombination of a free electron and a hole.

a. Recombination timeb. Delay timec. Conduction timed. Life time

ANSWER: d. Life time

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #990

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

10. Please Use One Page per Question. 11. Fill-out all needed information. 12. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A filter that blocks a signal with at most one frequency.

a. Brick wall filterb. Cauer filterc. Notch filterd. Butterworth filter

ANSWER: c. Notch filter

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #991

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

10. Please Use One Page per Question. 11. Fill-out all needed information. 12. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A term use to describe the death of amplification.

a. Oscillationb. Attenuationc. Degradationd. Hysteresis

ANSWER: a. Oscillation

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #992

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

13. Please Use One Page per Question. 14. Fill-out all needed information. 15. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The voltage that provides the border between the ohmic region and the constant current region of a depletion-mode device when the gate to source voltage is zero.

a. Threshold voltageb. Peak point voltagec. Valley point voltaged. Pinch off voltage

ANSWER: d. Pinch off voltage

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #992

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

13. Please Use One Page per Question. 14. Fill-out all needed information. 15. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A basic circuit that a designer can modify to get more advanced circuits.

a. Model circuitb. Miniature circuitc. Prototype d. Hybrid

ANSWER: c. Prototype

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #993

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

16. Please Use One Page per Question. 17. Fill-out all needed information. 18. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is a comparator with hysteresis.

a. Schmitt triggerb. Hysteresis circuitc. Trigger-comparatord. Latch circuit

ANSWER: a. Schmitt trigger

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #993

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

16. Please Use One Page per Question. 17. Fill-out all needed information. 18. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following special purpose diode doesn’t have depletion layer?

a. Tunnel diodeb. Schottky diodec. Varactor dioded. Zener diode

ANSWER: b. Schottky diode

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #993

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is define as a large initial current that flows through the diode of a rectifier.

a. Bleeder currentb. Surge currentc. Transient currentd. Saturated current

ANSWER: b. Surge current

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #994

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is defined as a four-layer semiconductor device that acts as a latch.

a. Thyrectorb. Transistorc. Transformerd. Thyristor

ANSWER: d. Thyristor

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #995

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is the value of the input voltage that switches the output of a comparator.

a. Trigger b. Trip pointc. Latch d. Knee

ANSWER: b. Trip point

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #995

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is a device that acts like two back-to-back-zener diodes.

a. Varistorb. Varactorc. Complementary zenerd. Zener latch

ANSWER: a. Varistor

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #996

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What do you call a thin slice of crystal used as a chassis for integrated components.

a. Substrateb. Basec. Waferd. Impurity

ANSWER: c. Wafer

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #996

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What is the other term for zener effect?

a. Avalanche effectb. Piezoelectric effectc. High field emissiond. Breakdown effect

ANSWER: c. High field emission

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #996

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the efficiency of a transformer-coupled class A amplifier for a supply of 12 V and outputs of 6V.

a. 50% b. 25% c. 12.5% d. 10%ANSWER: c. 12.5%

SOLUTION ( IF PROBLEM -SOLVING)

V CEMAX=V CEQ+V ( p )=12V +6V=18V

V CEMIN=V CEQ−V ( p )=12V −6V=6V

Resulting in

% η=50( 18V−6V18V +6V )

2

%=12.5%

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #673

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:For a class B amplifier providing a 20-V peak to a 16-Ω load (speaker) and a power supply of Vcc = 30 V, determine the circuit efficiency.

a. 45.2% b. 66.67% c. 78.5% d. 52.3%ANSWER: d. 52.3%SOLUTION ( IF PROBLEM -SOLVING)

I L ( p )=V L( p)

RL

=20V16

=1.25 A

I DC=2π

I L ( p )=2π

(1.25 A )=0.796 A

Pi (dc )=V CC I dc=(30V ) (0.796 A )=23.9W

Po (ac )=V 2

L

2RL

=¿¿

For resulting efficiency of

% η=Po(ac )Pi ¿¿

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #676

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:For a class B amplifier using a supply of Vcc = 30 V and driving a load of 16Ω, determine the maximum output power.

a. 28.13W b. 35.81W c. 41.23W d. 54.91WANSWER: b.35.81W

SOLUTION ( IF PROBLEM -SOLVING)

Maximum Pi (dc )=2V2cc

πRL=2(30V )2

π (16)=35.81W

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #677

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:For a class B amplifier using a supply of Vcc = 30 V and driving a load of 16Ω, determine the transistor dissipation

a. 3.7W b. 4.7W c. 5.7W d. 6.7WANSWER: c. 5.7W

SOLUTION ( IF PROBLEM -SOLVING)

Maximum Po=maximum P2Q

2=0.5( 2V 2

cc

π 2RL)=0.5[ 2(30V )2

π216 ]=5.7W

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #677

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the efficiency of a class B amplifier for a supply of Vcc = 24 V with peak output voltages of VL (p) = 22 V.

a. 62% b. 68% c. 72% d. 78%ANSWER: c. 72%

SOLUTION ( IF PROBLEM -SOLVING)

a. % η=78.54V L(P)

V CC

%=78.54 ( 22V24V )=72%

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #677

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the total harmonic distortion for the following amplitude components: fundamental amplitude of 2.5 V, second harmonic amplitude of 0.25 V, third harmonic amplitude of 0.1 V, and fourth harmonic amplitude of 0.05 V.

a. 11% b. 12% c. 13% d. 14%ANSWER: a. 11%SOLUTION ( IF PROBLEM -SOLVING)

%D 2=|A2||A1|

×100%=0.25V2.5V

×100%=10%

%D 3=|A3||A1|

×100%=0.1V2.5V

×100%=4%

%D 4=|A4||A1|

×100%=0.05V2.5V

×100%=2%

%THD=√ D22+D3

2+D42×100%

¿√ (0.10 )2+(0.04 )2+ (0.02 )2×100%=0.1095×100%¿10.95%

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #684

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Determine what maximum dissipation will be allowed for an 80-W silicon transistor (rated at25) if the reading is required above 25 by a derating factor of 0.5W/ at case temperature of 125.

a. 25W b. 30W c. 35W d. 40WANSWER: b. 30W

SOLUTION ( IF PROBLEM -SOLVING)PD (125 )=PD (25 )−(125−25 ) (0.5W / )

¿80W −100 (0.5W / )=30W

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #688

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A silicon power transistor is operated with a heat sink (θSA=1.5 /W ) .the transistor, rated at150 W (25 ) , hasθCS=0.5 /W , and the mounting insulation has θCS=0.6 /W . What maximum power can be dissipated if the ambient temperature is40∧T Jmax

=200?

a. 61.5W b. 71.5W c. 81.5W d. 91.5WANSWER: a. 61.5W

SOLUTION ( IF PROBLEM -SOLVING)

PD=T J−T A

θJC+θCS+θSA

= 200−400.5/W +0.6/W +1.5 /W

≈61.5W

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #690

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A dc voltage supply provides 50 V when the output is unloaded. When connected to a load, the output drops to 56 V. Calculate the value of voltage regulation.

a. 4.1% b. 7.1% c. 5.7% d. 10.7%ANSWER: b. 7.1%

SOLUTION ( IF PROBLEM -SOLVING)

%V . R .=V NL−V FL

V FL

×100%=60V −56V56V

×100%=7.1%

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #765

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the ripple voltage of a full-wave rectifier with a 100-μF filter capacitor connected to a load drawing to a load drawing 50 mA

a. 1.2V b. 2.5V c. 2.7V d. 3.1VANSWER: a. 1.2V

SOLUTION ( IF PROBLEM -SOLVING)

V r (rms )=2.4 (50 )100

=1.2V

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #767

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the filter dc Voltage of a full-wave rectifier with a 100-μF filter capacitor connected to a load drawing to a load drawing 50 mA if the peak rectifier voltage is 30 V.

a. 25.4V b. 26.1V c. 27.9V d. 28.6VANSWER: c. 27.9V

SOLUTION ( IF PROBLEM -SOLVING)

V dc=V m−4.17 Idc

C=30−

4.17 (50 )100

=27.9V

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #768

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the ripple of a capacitor filter for a peak rectified voltage of 30 V, capacitor C= 100μF, and a load current of 50 mA.

a. 3.7% b. 4.3% c. 5.1% d. 6.9%ANSWER b. 4.3%

SOLUTION ( IF PROBLEM -SOLVING)

r=2.41 I dc

CV dc

×100%=2.4 (50 )100 (27.9 )

×100%=4.3%

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #768

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Calculate the input bias currents at the non-inverting and inverting terminal respectively of an op=amp having specified values of IIO = 5nA and IIB = 30 nA.

a. Both 32.5nA b. Both 27.5nA c. 27.5nA; 32.5nA d. 32.5nA; 27.5nAANSWER: d. 32.5nA; 27.5nA

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #608

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

Determine the cutoff frequency of an op-amp having specified values B1 = 1 MHz and AVD = 200 V/mV.

a. 4Hz b. 5Hz c. 1kHz d. 1MHzANSWER: b. 5Hz

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #609

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

For an op-amp having a slew rate of SR = 2V/µs, what is the maximum closed loop voltage gain that can be used when the input signal varies by 0.5 V in 10 µs?

a. 10 b. 20 c. 30 d. 40ANSWER: d. 40

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #610

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Determine the output voltage of an op-amp for input voltages of Vi1 = 150 µV and Vi2 = 140 µV. The amplifier has a differential gain of Ad =4000 and the value of CMRR is 100.

a. 32.6mV b. 45.8mV c. 51.9mV d. 66.7mVANSWER: b. 45.8mV

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #619

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:If an amplifier with gain of -1000 and feedback of β=-0.1 has a gain change of 20% due to temperature; calculate the change in gain of the feedback amplifier

a. 10% b. 0.2% c. 20% d. 1%ANSWER b. 0.2%

SOLUTION ( IF PROBLEM -SOLVING)

|dA f

A f|≅| 1βA||dA

A |=| 1−0.1 (−1000 )|(20%) = 0.2%

Reference: Title of the book, author and pageElectronic Devices, by Robert Boylestad, page #737

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A transistor has a collector current of 10mA and a base current of 40uA. What is the current gain of the transistor

a. 20 b. 30 c. 40 d. 50ANSWER: d. 50

SOLUTION ( IF PROBLEM -SOLVING)β=10mA/40uA=50

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #194

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A 2N3904 has VCE=10V and IC=20mA. What is the power dissipation?

a. 0W b. 100mW c. 200mW d. 2N3904 is limited to 10mW ANSWER: c. 200mW

SOLUTION ( IF PROBLEM -SOLVING)PD=10V(20mA)=200mW

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #210

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A zener regulator has an input voltage that may vary from 22 to 30V. If the regulated output voltage is 12V and the load resistance varies from 140Ω to 10kΩ, what is the maximum allowable series resistance?

a. 140Ω b. 76.4 Ω c. 280 Ω d. 117 ΩANSWER: d. 117 Ω

SOLUTION ( IF PROBLEM -SOLVING)

R=( 2212−1)140Ω=117Ω

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #160

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

It is sometimes called hot-carrier diode.

a. Shockley diodeb. Schottky diodec. Gunn Dioded. Tunnel diode

ANSWER: b. Schottky diode

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #174

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A zener regulator has an input voltage ranging from 15 to 20V and a load current ranging from 5 to 20mA. If the zener voltage is 6.8V, what is the maximum allowable series resistance?

a. 750Ω b. 410 Ω c. 1000Ω d. 2000 ΩANSWER b. 410 Ω

SOLUTION ( IF PROBLEM -SOLVING)

R=( 15−6.820mA )=410Ω

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #160

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A 2N5668 has VGS(off)=-4V and IDSS=5mA. What are the gate voltage and drain current at the half cutoff point?

a. -1V; 1mA b. -2V; 1.25mA c. -4V; 5mA d. 0; 0ANSWER: b. -2V; 1.25mA

SOLUTION ( IF PROBLEM -SOLVING)

VGS=−4 V2

=−2V

ID=5mA4

=1.25mA

Reference: Title of the book, author and pageELECTRONICS PRINCIPLES 6th ed. by Paul Malvino, page #428

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A network that employ diodes to remove away a portion of an input signal without distorting the remaining part of the applied waveform

a. Clamperb. Rectifierc. Regulatord. Clipper

ANSWER: d. clipper

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #82

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

Atom with four valence electrons is called ____.

a. Trivalentb. Tetravalentc. Quadvalentd. Pentavalent

ANSWER: b. Tetravalent

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #7

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

The term applied to any semiconductor material that has been carefully refined to reduce the number of impurities to a very low-essentially as pure as can be made available through modern technology.

a. Intrinsicb. Crystalc. Latticed. Solid

ANSWER: a. Intrinsic

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #3

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

Who discovered electrons in 1897?

a. J. Thompsonb. E. Rutherfordc. J. Chadwickd. J. Maxwell

ANSWER: a. J. Thompson

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #1

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

What is the typical energy gap of silicon semiconductor?

a. 0.03eV b. 0.67eV c. 1.1eV d. 1.43eVANSWER: c. 1.1eV

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #8

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

Which of the following semiconductor material is sensitive to temperature change?

a. Carbonb. Germaniumc. Silicond. GaAs

ANSWER: b. Germanium

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #1

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

It occurs when a conduction-band electron loses energy and falls back into a hole in the valence band.

a. Ionizationb. Dopingc. Electron-holed. Recombination

ANSWER: d. Recombination

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #10

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following is not a pentavalent atom?

a. Phosphorusb. Antimonyc. Arsenicd. Boron

ANSWER: d. Boron

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #8

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How does minority carriers produced?

a. Dopingb. Ionizationc. Thermally producedd. Light energy

ANSWER: c. Thermally produced

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #11

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is an extremely small amount of current that exists in a reverse biased diode.

a. Forward saturated currentb. Reversed saturated currentc. Forward leakage currentd. Zener current

ANSWER: b. Reversed saturated current

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #11

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

4. Please Use One Page per Question. 5. Fill-out all needed information. 6. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

What is the typical reverse saturated current of a silicon diode?

a. 1uA b. 10uA c. 10pA d. 1pAANSWER: c. 10pA

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #15

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

What is the typical range of reverse breakdown voltage of silicon diode?

a. 2-200Vb. 50-1kVc. 50-400Vd. 100-10kV

ANSWER: b. 50-1kV

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #15

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

The time required for the minority carriers to return to the majority carrier state in the opposite material.

a. Transition timeb. Time constantc. Rise time d. Storage time

ANSWER: d. Storage time

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #31

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

Determine the thermal voltage of a diode at 27°C (common temperatures for components in an enclosed operating system)

a. 20mV b. 26mV c. 30mV d. 1VANSWER: b. 26mV

SOLUTION ( IF PROBLEM -SOLVING)Vt =kT/q=(1.38x10-23J/K)(273+17)/1.6x10-19C = 26mV

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #13

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

What is the knee voltage of a silicon diode at 75°C?

a. 0.7V b. 2.1V c. 0.58V d. 0VANSWER: c. 0.58V

SOLUTION ( IF PROBLEM -SOLVING)(75-25)°C*2.5mV/°C = 0.125V

New Vknee = 0.7-0.125 = 0.575V

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #18

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

At 20°C, the reverse saturation current of a silicon diode is 10nA, what is its value when the temperature increases to 100°C?

a. 0.32uA b. 50nA c. 10nA d. 0AANSWER: a. 0.32uA

SOLUTION ( IF PROBLEM -SOLVING)100 °C / 20°C = 5

New Ireverse = 25(10nA)= 0.32uA

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #18

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

A silicon diode is in series with 1kΩ resistor and a forward biasing voltage supply of 10V. If r’d is 10Ω, what is the anode to cathode current and voltage?

a. 9.3mA, 0.7Vb. 9.3mA,0.79Vc. 9.21mA,0.7Vd. 9.21mA,0.79V

ANSWER: d. 9.21mA,0.79V

SOLUTION ( IF PROBLEM -SOLVING)IF=(10-0.7)/(10+1k)=9.21mAVF=0.7+10(9.21mA=0.79V

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #68

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:

What is the wavelength of the light produced by an LED with an energy gap level of 1.43 eV?

a. 569nmb. 669nmc. 768nmd. 869nm

ANSWER: d. 869nm

SOLUTION ( IF PROBLEM -SOLVING)λ=hc/Eg =(6.626x10-34Js*3x108m/s) /(1.43eV*1.6x10-19J/eV) = 869nm

Reference: Title of the book, author and pageELECTRONICS DEVICES by Rober Boylestad page #44

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What does FPGA stands for?

a. Field p-type gate arrayb. Field programmable gate arrangementc. Field programmable gate arrayd. FET programmable gate array

ANSWER: c. Field programmable gate array

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#40

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Find the 2’s complement of 10110010.

a. 01001101b. 01001100c. 11001101d. 10111101

ANSWER: a. 01001101

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#60

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Convert the binary number 11000110 to gray code

a. 1011101b. 10100111c. 10000101d. 10100101

ANSWER: d. 10100101

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#89

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following can be used as universal gate?

a. ANDb. ORc. NANDd. NOT

ANSWER: c. NAND

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#129

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A logic gate that produces a HIGH output only when its two inputs are at opposite levels.

a. ORb. XORc. NORd. XNOR

ANSWER: b. XOR

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#168

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The complement of a sum of variables is equal to the product of the complements of the variables.

a. Boolean’s Ruleb. De Morgan’s Theoremsc. Baudot’s Lawd. Karnaugh’s Rule

ANSWER: b. De Morgan’s Theorems

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#191

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following expression is in standard SOP form?

a. F=ABC+AB’C+A’B’C’b. F=A’+BC+ABC’c. F=AB+AC+BCd. All of the above

ANSWER: a. F=ABC+AB’C+A’B’C’

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#200

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:In a 4 variable K-map, what is the binary value for the cell in the lower right corner?

a. 0000b. 1111c. 0101d. 1010

ANSWER: d. 1010

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#211

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:It is a digital circuit that adds two bits and an input carry to produce a sum and an output carry.

a. Half adderb. Full adderc. Demultiplexerd. Encoder

ANSWER: b. Full adder

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#354

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Which of the following is the invalid state for RS flip flop?

a. S=0; R=0b. S=0; R=1c. S=1; R=0d. S=1; R=1

ANSWER: d. S=1; R=1

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#379

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:In T flip flop, T stands for:

a. Timeb. Tripc. Transientd. Toggle

ANSWER: d. Toggle

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#371

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How many flip-flop/s is/are need to produce 2kHz frequency from 8kHz input?

a. 1 b. 2 c.3 d. 4ANSWER: b. 2

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#394

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:A flip-flop is in the toggle condition when:

a. J=0; K=0b. J=0; K=1c. J=1; K=0d. J=1; K=1

ANSWER: d. J=1; K=1

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#414

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How many flip-flops are needed to produce 4-bit asynchronous counter?

a. 2 b. 4 c. 6 d. 8ANSWER: b. 4

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#431

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:How many flip-flops are needed to produce modulus-12 asynchronous counter?

a. 4 b. 8 c. 12 d. 10ANSWER: a. 4

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#434

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:What do you call the number of unique states through which a counter will sequence?

a. Stateb. Sequencec. Modulusd. Counts

ANSWER: c. Modulus

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#480

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Asynchronous counters are known as:

a. ripple counters b. multiple clock counters c. decade countersd. modulus counters

ANSWER: a. ripple counters

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#427

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The modulus of a counter is

(a) the number of flip-flops (b) the actual number of states in its sequence (c) the number of times it recycles in a second (d) the maximum possible number of states

ANSWER: b. the actual number of states in its sequence

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#481

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:Three cascaded modulus-10 counters have an overall modulus of

a. 30 b. 100 c. 1000 d. 10000ANSWER: c. 1000

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#481

IECEP-Manila Form 1 S.2011 TEST QUESTIONS

1. Please Use One Page per Question. 2. Fill-out all needed information. 3. Submissions with incomplete data will not be considered.

PROFILE OF CONTRIBUTORName of SchoolAddress Signature over Printed Name , Position

Area of Specialization Academe (Teaching Electronics, Mathematics, and General Engineering Subjects)

Please indicate the subject:( ) Electronics Engineering( ) Engineering MathematicsQUESTION:The terminal count of a modulus-13 binary counter is

a. 0000b. 1111c. 1101d. 1100

ANSWER: d. 1100

SOLUTION ( IF PROBLEM -SOLVING)

Reference: Title of the book, author and pageDigital Fundamentals by Thomas Floyd, page#481