47. An amplifier has an open loop voltage gain of 1,00,000. With negative voltage feedback, the voltage gain is reduced to 100. What is the sacrifice factor ?
(a)1000 (b)100 (c)5000 (d)none of the above
Answer
Answer : (a)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Amplifiers » Exercise - 123. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative voltage feedback is approximately ....... (a) 500 (b) 100 (c) 1000 (d) 5000
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Amplifiers » Exercise - 145. If the voltage gain of an amplifier without feedback is 20 and with negative voltage feedback it is 12, then feedback fraction is ........ (a) 5/3 (b) 3/5 (c) 1/5 (d) 0.033
Tags: feedback, amplifiers, voltage, exercise, gain, amplifier, negative, electronics, engineering
Amplifiers » Exercise - 119. When negative voltage feedback is applied to an amplifier, its voltage gain ............ (a) is increased (b) is reduced (c) remains the same (d) none of the above
Amplifiers » Exercise - 125. The gain of an amplifier with feedback is known as ........... gain. (a) resonant (b) open loop (c) closed loop (d) none of the above
Tags: amplifiers, gain, loop, exercise, amplifier, feedback, open, electronics, engineering
Amplifiers » Exercise - 17. Negative feedback in an amplifier : (a) reduces the voltage gain (b) increases the voltage gain (c) does not affect the voltage gain (d) converts the amplifier into an oscillator
Tags: voltage, gain, amplifiers, amplifier, exercise, negative, feedback, electronics, engineering