Questions
The voltage gain of an amplifier with 7% negative feedback is 9. The voltage gain without feedback will be
a
2.4
b
24.32
c
0.24
d
243.2
detailed solution
Correct option is B
For Negative feedback loop, A1=A1+βA where β=7100=0.07 and A1=9⇒9=A1+0.07A ⇒ 9+0.63A=A ⇒ 0.37A=9⇒A=90.37=24.32here A is gain without feedbackTalk to our academic expert!
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