Made Easy Online Test Series Mu -3

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SC OR E C AR D T IME MAN AG EMEN T Q UEST IO NS R EPO RT SOLUTI ON

Solution Report For Microprocessors, EMT : Adv : PracticeTest - 25Represent whole test solution with correct and incorrect answers.

View Your Test Analysis

Q.No

Question Status

Q.1

Attempt Correct Correct Ans. b

SolutionHave any doubt?F A Q ?

Consider a scalar field V given in cylindrical coordinates (, , z).

V= 52

sin 2

Laplacian of Vat is

a. 5

b. 0

c. 10

d . 1 0

Q.2

Attempt Correct Correct Ans. d


Magnetic flux density and magnetic vector potential are related by

a.

b.

c.

d.

REPORTS

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Q.3

Not Attempt Correct Ans. d


The electric field vector in free space is given by

The displacement current density vector is given by

a.

b.

c.

d.

Q.4

Attempt Correct Correct Ans. c


Consider an infinite length lossless transmission line with characteristic

impedance Z0= 50 . If the line is terminated with a load ZL= 75 , then

the ratio maximum input impedance to the minimum input impedance on

the line is given by

a.

b.

c.

d.

Q.5

The magnetic field intensity vector of a plane wave propagating in a

lossless medium is given by

The direction of rate of energy flow is in

a . d i r e c t i o n
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3/11

Attempt Incorrect Your Ans. c Correct Ans. d


b . d i r e c t i o n

c. direction

d . d i r e c t i o n

Q.6

Attempt Incorrect Your Ans. a Correct Ans. d


Which of the following is/are true about accumulator of INTEL 8085.

(i) Result of all arithmetic and logical instruction is stored in

accumulator.

(ii) One of the operand for arithmetic and logical instruction must be in

accumulator.

(iii) To move data from one memory location to another data must pass

through accumulator.

a. (i) a n d (ii)

b. (ii) a n d (iii)

c. (iii) a n d (i)

d. None of these

Q.7

Attempt Correct Correct Ans. c


Which of the following statements is not true regarding INTEL 8085.

a. Stack is a part of memory interfaced with micropr ocessor.

b . P r o g r a m c o u n te r i s s y n c h ro n o u s c o u n t e r .

c. Only H-L p a i r c a n b e u s e d a s m e m o r y p o i n t e r .

d. Maximum T-states in an instruction cycle are 6.

Q.8

Attempt Incorrect Your Ans. c Correct Ans. b


After execution of last arithmetic instruction of a certain program, the

content of flag register was found to be 95 H. The contents of

accumulator can be

a . 9 2 H

b. 95H

c. C2Hd . 5 9 H
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Q.9

Attempt Incorrect Your Ans. d Correct Ans. c


Which of the following statement is incorrect regarding INTEL 8085?

a. Read /Write memory is used for temporary storage.

b . C a r r y fl a g i s m o d i f i e d i n R A L a n d R L C b o t h .

c. Logi cal instruction s do not affect the carry flag.

d. When RET instruction is executed stack poin ter is increme nted by 2.

Q.10

Attempt Incorrect Your Ans. 0 Correct Ans. 4


The electric field vector in spherical coordinates (r, , ) is given by

The potential of point with res pect to (r = 4

m, = , = ) is _______ V.

Q.11



In INTEL 8085, while executing a program non maskable interrupt

occurs. The data present on data line is _______ H

Q.12

Attempt Incorrect Your Ans. 6 Correct Ans. 8.90 (8.50 - 9.20)


Spherical surfaces at r = 2 and 4 m carry uniform surface charge

densities of 20 nC/m2 and 4 nC/m2 respectively. The radial electric flux

density atr= 3 m is given by ________ nC/m2.

Q.13

Consider three lossless transmission lines as shown in the figure. All

the lines have characteristic impedance Z0= 50 . The input impedance

Zinlooking into line 3 is given by ________


5/11

Not Attempt Correct Ans. 100


Q.14



A rectangular waveguide with dimensions 2 cm 4 cm is filled with adielectric material (r= 4, r = 1). The largest wavelength that can be

propagated through the guide is _____ cm.

Q.15



A read write memory chip has a capacity of 32 M bytes. If the memory

chip is having equal number address lines and data lines, then minimum

number of data lines are _____.

Q.16

Attempt Correct Correct Ans. 1


Consider the following assembly language program in INTEL 8085.

XRA A

LXI B, 000F H

LOOP DCX B

ANI FF H

JC LOOP

HLT

While execution of above program the loop will be executed _____ times.

Q.17


6/11

Attempt Incorrect Your Ans. d Correct Ans. a


When a right circularly polarized wave is incident on a perfect conductorat 45 angle, the reflected wave is

a . L e f t c i r c u l a r l y p o l a r i z e d

b . R i g h t c i r c u l a r l y p o l a r i z e d

c . L i n e a r y p o l a r i z e d

d . e l l i p t i c a l l y p o l a r i z e d

Q.18

Not Attempt Correct Ans. b


A medium is divided into two regions I and II about z = 0 plane as shown

in the figure below.

If the interface carries surface current

and magnetic flux density in region II

the magnetic flux density in region I, is given by

a.

b.

c.

d.

Q.19

A nonmagnetic medium has an intrinsic impedance . If the

complex permittivity of the medium is given by

c= (x+jy) 1012 F/m,


7/11

Not Attempt Correct Ans. bSolutionHave any doubt?F A Q ?

then the values ofx, yare respectively given by

a. 8.84, 15.3

b. 10.91, 18.9

c. 14.3, 24.8

d. 1.091, 1.89

Q.20



An electromagnetic wave is travelling at an angle iwith respect to the z-

axis within a medium with dielectric permittivity and magnetic

permeability . The magnetic field is given as

The wavelength (in meters) and i(in degrees) are respectively given by

a. 1, 60

b. 2, 30

c. 1, 30

d. 2, 60

Q.21

Not Attempt Correct Ans. b

A 200 106 rad/s uniform plane with electric field vector

v/m is propagating in a lossless dielectric

medium (r = 4, r = 1). If the wave enters free space normally at z = 0,

the power density forz> 0 is given by

a. 176.8 mW/m2

b. 235.8 mW/m2

c. 117.9 mW/m2

d. 471.6 mW/m2


8/11


Q.22

Attempt Incorrect Your Ans. c Correct Ans. a


If the HLT instruction is executed in INTEL 8085 then

a. the micropro cessor enters into halt state and buses are tristated

b. the microprocessor is disconne cted from the system bus till the reset is

p r e s s e d .

c . t h e m i c r o p r o c e s so r h a l t s t h e e x e c u t i o n a n d l o a d 0 0 0 0 H t o t h ep r o g r a m c o u n t e r .

d . N o n e o f t h e s e

Q.23



Consider the following program to be executed in INTEL 8085 states

from3000 H

LXI SP, 4000 H

PUSH H

PUSH D

CALL 3050 H

POP H

HLT

After execution of HLT instruction, the program counter and stack

pointer contains respectively

a. 300A H,3FFC H

b. 3009 H,3FFC H

c. 300A H,3FFE H

d. 3009 H, 3FFE H

Q.24

Consider the following statements

(i) If the 8085 is interrupted while executing 3 byte instruction (assuming

interrupt is enabled), the processor

will acknowledge the interrupt request immediately even before the

completion of instruction.

(ii) Instruction RIM is used to disable the interrupts RST 7.5, RST 6.5, RST

5.5.

(iii) When an 8085 system is reset, all the interrupts including TRAP are

disabled.

Which of the above statements is/are incorrect.
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9/11

Attempt Incorrect Your Ans. a Correct Ans. d


a. (i) a n d (ii)

b. (i) a n d (iii)

c. (iii) a n d (ii)

d . A l l o f t h e a b o v e

Q.25



Consider the assembly language program given below

(1) MVI A, 8F H

(2) SUI CA H

(3) JC DISPLAY

(4) OUT PORT1

(5) HLT

(6) DISPLAY: XRA A

(7) OUT PORT1

(8) HLT

If the above program is executed in 8085 then data displayed at PORT 1

and content of flag register is respectively.

a. 00 H, i H

b. C5 H,95 H

c. C5 H,94 H

d. 00 H,94 H

Q.26

Attempt Incorrect Your Ans. 0.021 Correct Ans.

21.25 (21.15 - 21.35)SolutionHave any doubt?F A Q ?

Consider a parallel plate capacitor (shown in figure) which is sandwich of

two dielectric media of the same thickness (d= 1 cm) and plate area A of

10 cm 10 cm. Neglecting the field outside the capacitor, the electric

flux density at the dielectric interface is ________ nC/m2

Q.27


10/11

Not Attempt Correct Ans. 1.99 (1.60 - 2.15)SolutionHave any doubt?F A Q ?

In a certain material, at a frequency 90 GHz, the magnitudes of

conduction current density and displacement current densities are

equal. If the medium has conductivity of 10 (m)1, the relative

permittivity of the medium is _________ .

Q.28



Given a vector field in cartesian coordinates

The value of [where S is the surface of the cube defined by 0 x

2, 0 y 2,0 z 2] is given by ________.

Q.29

Not Attempt Correct Ans. 157.90 (157.50 - 158.50)


The magnetic field component of a plane wave in a lossless dielectric (r

= 1) is

The wave impedance is given by ________ .

Q.30

Not Attempt Correct Ans. 26.56 (26.00 - 27.00)


A uniform plane wave propagating in free space is incident on a lossless

dielectric (r= 4, r= 1) is totally transmitted. The angle of transmission

is given by _________ degrees.

Q.31

Consider the following program for INTEL 8085.


11/11



After execution of program the decimal equivalent of data present at

2450 H is _____ .

Q.32

Attempt Incorrect Your Ans. 3.2 Correct Ans.2.40 (2.00 - 3.00)


If the clock frequency of a microprocessor is 5 MHz. Then the timerequired to execute PUSH B instruction is _____ sec.

Q.33



Consider the following assembly language program

MVI A,ACH

MVI B, FFH

XRA B

ANI FF H

DAA

HLT

The program was executed in 8085, after execution of HLT the decimal

equivalent of data present in

accumulator is _____.

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