Electronics and Communication Engineering - Analog Electronics

21. 

An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. Which of the following will increases from this type of operation?

A. Stability
B. Bandwidth
C. Distortion
D. Input resistance

Answer: Option C

Explanation:

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

22. 

For a transistor if adc = 0.98 and emitter current IE is 2 mA, then base current will be

A. 10 μA
B. 40 μA
C. 80 μA
D. 200 μA

Answer: Option A

Explanation:

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

23. 

Assertion (A): Linear ICs include audio amplifier, wideband amplifier, RF amplifier and IF amplifier

Reason (R): The error voltage in a feedback circuit is very small

A. Both A and R are correct and R is correct explanation for A
B. Both A and R are correct but R is not correct explanation for A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option B

Explanation:

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

24. 

The given circuit has a feedback factor of

A.
B.
C.
D.

Answer: Option D

Explanation:

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

25. 

Assertion (A): The horizontal intercept of dc load line is the same as ideal cut off point

Reason (R): When a transistor is in cut off region, collector current is zero

A. Both A and R are correct and R is correct explanation for A
B. Both A and R are correct but R is not correct explanation for A
C. A is correct R is wrong
D. A is wrong R is correct

Answer: Option A

Explanation:

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