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Amplifiers – 1 – 6

26. When voltage feedback (negative) is applied to an amplifier, its input impedance …….

(a) is decreased
(b) is increased
(c) remains the same
(d) none of the above

Answer
Answer : (b)

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

27. When current feedback (negative) is applied to an amplifier, its input impedance ………

(a) is decreased
(b) is increased
(c) remains the same
(d) none of the above

Answer
Answer : (a)

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

28. Negative feedback is employed in …….

(a) oscillators
(b) rectifiers
(c) amplifiers
(d) none of the above

Answer
Answer : (c)

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

29. Emitter follower is used for ……..

(a) current gain
(b) impedance matching
(c) voltage gain
(d) none of the above

Answer
Answer : (b)

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

30. The voltage gain of an emitter follower is …

(a) much less than 1
(b) approximately equal to 1
(c) greater than 1
(d) none of the above

Answer
Answer : (b)

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

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