Operational Amplifier and Its Applications MCQs

Question 1

Class ............ power amplifier has the highest collector efficiency.

Accepted Answer

C

Answer

A

Answer

B

Answer

AB

Question 2

Power amplifier handle ............ signals compared to voltage amplifiers.

Accepted Answer

large

Answer

small

Answer

very small

Answer

none of the above

Question 3

Class C amplifiers are used as

Accepted Answer

R.F. amplifiers

Answer

AF amplifiers

Answer

detectors

Answer

none of the above

Question 4

The maximum collector efficiency of class B operation is

Accepted Answer

78.50%

Answer

50%

Answer

90%

Answer

60.50%

Question 5

A 2-transistor class B power amplifier is commonly called ____ amplifier.

Accepted Answer

push-pull

Answer

dual

Answer

symmetrical differential

Question 6

If a transistor is operated in such a way that output current flows for 600 of the input signal, then it is ____ operation.

Accepted Answer

class C

Answer

class A

Answer

class B

Answer

none of the above

Question 7

If the zero signal power dissipation of a transistor is 1 W, then power rating of the transistor should be atleast

Accepted Answer

1 W

Answer

0.5 W

Answer

0.33 W

Answer

0.75 W

Question 8

When a transistor is cut off,

Accepted Answer

maximum voltage appears across transistor

Answer

maximum current flows

Answer

maximom voltage appears across load

Answer

none of the above

Question 9

A class A power amplifier is sometimes called _____ amplifier

Accepted Answer

single-end

Answer

symmetrical

Answer

reciprocating

Answer

differential