Electronics and Communication Engineering - Analog Electronics

16. 

In deriving ac equivalent circuit for an amplifier circuit we short circuit

A. all resistors
B. all transistors
C. all inductors
D. all capacitors

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

17. 

Which of the following statements is false?

A. Push pull signals are equal and opposite in phase
B. Class AB operation cannot be used for a push pull audio power output phase
C. A push pull output transformer has a centre-tapped primary
D. All of the above

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

18. 

Which of the following amplifier circuit using junction transistor has the best gain?

A. Common base
B. Common emitter
C. Common collector
D. All have the same gain

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

19. 

In an op-amp differentiator

A. the amplitude of output is proportional to rate of change of input
B. the amplitude of output is proportional to input
C. output occurs when input is finite and constant
D. polarity of input and output is the same

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

20. 

In switching devices, gold doping is used to

A. improve bonding
B. reduce storage time
C. increase the mobility of the carrier
D. protect the terminals against cooperation

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.