menti quiz - 5...in the given figure, a diode d is connected to an external resistance r = 100Ωand...

A semiconductor X is made by doping a germanium crystal with arsenic

(Z = 33). A second semiconductor Y is made by doping germanium with

indium (Z = 49). The two are joined end to end and connected to a

battery as shown. Which of the following statements is correct

(A) X is P-type, Y is N-type and the junction is forward biased

(B) X is N-type, Y is P-type and the junction is forward biased

(C) X is P-type, Y is N-type and the junction is reverse biased

(D) X is N-type, Y is P-type and the junction is

MENTI QUIZ - 5

www.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

01

X Y

Avalanche breakdown is due to;

(A) Collision of minority charge carrier

(B) Increase in depletion layer thickness

(C) Decrease in depletion layer thickness

(D) None of these


02

Which of the following is not a rectifier circuit;


03

For given electric voltage signal dc value is;

(A) 6.28 V (B) 3.14 V

(C) 4V (D) 0 V


04

V

6.28V

t

The correct symbol for zener diode is;


05

If the voltage between the terminals a and B is 17V

and Zener breakdown voltage is 9V, then the potential

across R is;

(A) 6V (B) 8V

(C) 9V (D) 17Vwww.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

06

A

B

R

RL

In the following circuit, the current flowing through 1

kΩ resistor is;

(A) 0 mA (B) 5 mA

(C) 10 mA (D) 15 mAwww.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

07

5V10V

500

1k

Of the diodes shown in the following diagrams, which one is

reverse biased;


08

Find VAB;

(A) 10 V (B) 20 V

(C) 30 V (D) None of these


09

30V

10 10

10

VAB

In the given figure, a diode D is connected to an external

resistance R = 100Ω and an e.m.f. of 3.5V. If the barrier

potential developed across the diode is 0.5 V, the current in

the circuit will be;

(A) 40 mA

(B) 20 mA

(C) 35 mA

(D) 30 mAwww.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

10

3.5V

RD

Which logic gate is represented by following

diagram;

(A) AND (B) OR

(C) NOR (D) XOR


11

The figure shows a logic circuit with two inputs A and

B and the output C. The voltage wave forms across A,

B and C are as given. The logic circuit gate is;

(A) OR gate

(B) NOR gate

(C) AND gate

(D) NAND gatewww.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

12

0

B

Ct1 t2 t3 t4 t5 t6

A

The following figure shows a logic gate circuit with two inputs A

and B and the output Y. The voltage waveforms of A, B and the

output Y are as given

The logic gate is;

(A) NOR gate (B) OR gate

(C) AND gate (D) NAND gate


13

AB

YLogic gate circuit

1

1

1

0

0

0

t1 t2t3

t4 t5 t6

A

B

Y

The output(X) of the logic circuit shown in figure

will be;


14

XA

B

In the following circuit, the output Y for all possible inputs A

and B is expressed by the truth table;


15

A A

B BY

Wh


16

To get an output 1 from the circuit shown in the

figure, the input must be;

(A) A = 0, B = 1, C = 0 (B) A = 1, B = 0, C = 0

(C) A = 1, B = 0, C = 1 (D) A = 1, B = 1, C = 0


17

A

B

C

The output y, when all three inputs are first high

and then low, will respectively be;

(A) 1, 0 (B) 1, 1

(C) 0, 0 (D) 0, 1


18

y

For the given combination of gates, if the logic states

of inputs A, B, C are as follows A = B = C = 0 and A =

B = 1, C = 0 then the logic states of output D are;

(A) 0, 0 (B) 0, 1

(C) 1, 0 (D) 1, 1www.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

19

D

A

B

C

G1

G2

In the following combinations of logic gates, the outputs A,

B and C are respectively;


20

If the circuit given A, B and C are inputs and Y is the output;

The output of Y is;

(A) High for all the high inputs

(B) High for all the low inputs

(C) High when A = 1, B = 1, C = 0

(D) Low for all low inputswww.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

21

A

B

CY(A+B.C)

A+B

The diagram of a logic circuit is given below. The

output F of the circuit is represented by;

(A) W . (X + Y) (B) W . (X . Y)

(C) W + (X . Y) (D) W + (X + Y)www.gangwarinstitue.com Contact : 8400-582-582, 8604-582-582

22

W

X

Y

W

F

In circuit in following figure the value of Y is;

(A) 0

(B) 1

(C) Fluctuates between 0 and 1

(D) Indeterminate as the circuit can’t be realised


23

A

B

0

1

G1

G2

G3

y

Truth table for the given circuit is


24

A

B

C

D

E

The truth table for the following logic circuit is;


25

Y

A

A

BB

The following configuration of gate is equivalent to;

(A) NAND (B) XOR

(C) OR (D) None of these


26

Y

AND

G3

G2

G1

NAND

ORA

B

The decimal equivalent of the binary number

(11010.101)2 is;

(A) 9.625

(B) 25.265

(C) 26.625

(D) 26.265


27

What is the output Y in the following circuit, when

all the three inputs A, B, C are first 0 and then 1;

(A) 1, 0 (B) 1, 1

(C) 0, 1 (D) 0, 0


28

YP

Q

A

BC

To get output 1 for the following circuit, the correct

choice for the input is;

(A) A = 0, B = 1, C = 0 (B) A = 1, B = 0, C = 0

(C) A = 1, B = 1, C = 0 (D) A = 1, B = 0, C = 1


29

ABC Y

The given electrical network is equivalent to;

(A) AND gate (B) OR gate

(C) NOR gate (D) NOT gate


30

Y

Which

Thank you 9-8

menti quiz - 5...in the given figure, a diode d is connected to an external resistance r = 100Ωand...

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