In a common emitter amplifier the load resistance of the output circuit is 396 times the resistance if the input circuit. If α=0.99, then voltage gain is
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a
79200
b
39600
c
7920
d
3960
answer is B.
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Detailed Solution
Given : RL=396Ri , α=0.99Current Gain : β=α1−α=0.991−0.99=0.990.01=991=99Voltage Gain : AV=β.RLRi=(99)(396)=39204≃39600