7/25/2019 Question Bank BEEE.pdf

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L.J. POLYTECHNIC

SUBJECT NAME: BASIC OF ELECTRICAL & ELECTRONICS ENGINEERING.

SUBJECT CODE: 3300014.

QUESTION BANKUnit-1: Fundamentals of Electrical and Magnetic Circuit.

1. Give the definition of the following terms :(1) E.M.F (2) Current (3) Potential difference (4) Power (5) Energy

(6) Resistance (7) Resistivity (8) Magnetic circuit (9) M.M.F (10) Magnetic flux density

(11) Magnetic field intensity (12) Permeability (13) Permeability of air or vacuum

(14) Absolute permeability (15) Relative permeability (16) Reluctance (17) Reluctivity

(18) Permeance (19) Leakage flux (20) Leakage factor.

2. Give the comparison between Electric circuit and Magnetic circuit.

3. Explain ohm’s law. With its limitations.

4. Explain Factors Affecting the Resistance.

5. Give the Difference between EMF and Potential Difference.

6. Explain Hysteresis loop in brief.

Unit-2: A.C. Fundamentals and Electromagnetic Induction.1. State and explain Farady’s law of Electromagnetic Induction .

2. Explain dynamically induced emf.

3. Explain statically induced emf.4. Give the comparison between statically and dynamically induced emf.

5. Define the self-inductance and derive the expressions for it.

6. Define the mutual-inductance and derive the expressions for it.

7. Give the definition of the following terms.

(1) Cycle (2) Frequency (3) Time period (4) Amplitude

(5) Instantaneous value (6) R.M.S value (7) Average value (8) Form factor

(9) Peak factor (10) Phase (11) Phase difference.

8. Explain A.C Through Pure Resistor, Inductor and Capacitor.

9. Explain Fleming’s Right and Left hand Rule.

7/25/2019 Question Bank BEEE.pdf

http://slidepdf.com/reader/full/question-bank-beeepdf 2/2

L.J. POLYTECHNIC

SUBJECT NAME: BASIC OF ELECTRICAL & ELECTRONICS ENGINEERING.

SUBJECT CODE: 3300014.

Unit-3: Electrical Measuring Instruments and Basic Electronics

1. List any Seven Electrical Measuring Instruments and One application of each.

2. Draw and explain the methods of connecting voltmeter, ammeter, wattmeter and energymeter.

3. Explain Megger, Clip-on Meter and Multimeter with diagram.

4. Explain P-type and N-type Semiconductor.

5. Explain conductor, insulator and semiconductor with Energy Band Diagram.

6. Explain PN Junction Diode and list out the applications of PN Junction.

7. Explain the working of NPN and PNP transistor.

8. Draw general construction and symbol of i) SCR ii) Photo Diode iii) Photo transistoriv) LDR v) LED vi) LCD.

Unit-4: Transformer and Protective Devices

1. Define transformer and explain the basic construction, working principal of transformer.

2. Define the transformation ratio and turns ratio.

3. Define the emf equation for 1-phase transformer.

4. Explain the losses in transformer.

5. Explain the construction and working of auto- transformer. Also list out the advantages

and applications of auto-transformer.

6. Compare the auto-transformer with transformer.7. Explain the fuse and types of fuse in details.

8. Explain the construction and working of M.C.B and E.L.C.B with neat diagram.

9. What is earthing? What is necessity of earthing?

10. Explain the pipe earthing and plate earthing with necessary diagram.

Unit-5: Electrical Machines

1. Define the D.C Generator. And explain the working principle and construction of D.C

Generator.

2. Give the types of D.C Generator and explain each in brief.

3. Explain the working principle of 3-phase induction motor.

4. Give the comparison of squirrel cage and slip induction motor.

5. Explain construction and working of phase wound induction motor.

6. Explain squirrel cage induction motor.