Amplifiers – 4

4. If the feedback signal is returned to the input in series with the applied voltage, the input impedance :

(a) decreases
(b) increases
(c) does not change
(d) becomes infinity

Answer

Answer : (b)

Explanation

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

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Amplifiers - 35
Amplifiers » Exercise - 135. An emitter follower has ..... input impedance. (a) zero (b) low (c) high (d) none of the above
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Amplifiers - 26
Amplifiers » Exercise - 126. 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
Tags: amplifiers, exercise, voltage, feedback, applied, input, impedance, electronics, engineering
Feedback Amplifiers - 9
Feedback Amplifiers » Exercise - 19. The shunt-derived series-fed feedback in an amplifier : (a) increases its output impedance (b) decreases its output impedance (c) increases its input impedance (d) both (b) and (c)
Tags: impedance, feedback, amplifiers, increases, exercise, decreases, input, electronics, engineering
Amplifiers - 33
Amplifiers » Exercise - 133. If voltage feedback (negative) is applied to an amplifier, its output impedance ........ (a) remains the same (b) is increased (c) is decreased (d) none of the above
Tags: amplifiers, exercise, voltage, feedback, applied, impedance, electronics, engineering
Amplifiers - 27
Amplifiers » Exercise - 127. 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
Tags: amplifiers, exercise, feedback, applied, input, impedance, electronics, engineering

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