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Q.

The voltage gain of an amplifier without feedback is 100. Find voltage gain with 7% of negative feedback.

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a

10

b

12.5

c

15

d

18

answer is B.

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Detailed Solution

A'=A1+βA,A'=1001+7100×100,A'=1008=12.5
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The voltage gain of an amplifier without feedback is 100. Find voltage gain with 7% of negative feedback.