MCQ on Electronics and Communication

MCQ on Electronics and Communication

1-Which of the following is not a sinusoidal oscillator?

(A) RC phase shift

(B) Wien bridge

(C) Crystal

(D) UJT relaxation

 

2-Integrator is a ___ filter.

(A) high pass

(B) low pass

(C) band pass

(D) band stop

 

3-Moving coil meter is usually used for measurement of

(A) AC and DC

(B) DC only

(C) AC only

(D) None of the above

 

4-Barkhausen criterion is important in

(A) Oscillation

(B) Rectification

(C) Doping

(D) Demodulation

 

5-The timer IC 555 is available in ____ package.

(A) 3 pin

(B) 14 pin DIP

(C) 8 pin DIP

(D) 16 pin DIP

 

6-The time-base of a CRO is ___ waveform.

(A) sawtooth

(B) sine

(C) square

(D) rectangular

 

7-AM (Amplitude modulation) wave has ___ side bands.

(A) no

(B) one

(C) a number of

(D) two

 

8-OP-AMP may be used as

(A) summing amplifier

(B) voltage comparator

(C) differentiator

(D) all of the above

 

9-The number of turns in secondary of a ___ transformer is more than the primary.

(A) step-down

(B) step-up

(C) 230 V to 6 V

(D) 11 kV to 230 V

 

10-In a multistage amplifier, the overall voltage gain is equal to ___ of the gains of individual stages.

(A) sum

(B) half

(C) product

(D) gain of one stage

 

ANSWERS:

1-(D), 2-(B), 3-(A), 4-(A), 5-(C), 6-(B), 7-(D), 8-(D), 9-(B), 10-(C)