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The voltage gain of an amplifier with 9%...

The voltage gain of an amplifier with `9%` negative feedback is 10. The voltage gain without feedback will be

A

1.25

B

100

C

90

D

10

Text Solution

Verified by Experts

The correct Answer is:
B
`"Voltage gain"=(A_(V))/(1+beta.A_(V)),`
where `beta=(9)/(100)=0.09`, voltage gain = 10
`rArr" "10=(A_(V))/(1+(9)/(100).A_(V))`
`rArr A_(V)=(10)/(0.1)=100`
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