The input resistance of a silicon transistor is `100Omega` base current is changed by `40muA` which results in a change in collector current by `2mA`. This transistor is used as a common emitter amplifier with a load resistance of `4kOmega`. The voltage gain of the amplifier isA. 2000B. 3000C. 4000D. 1000

The input resistance of a silicon transistor is `100Omega` base curren

1.	The input resistance of a silicon transistor is `100Omega` base current is changed by `40muA` which results in a change in collector current by `2mA`. This transistor is used as a common emitter amplifier with a load resistance of `4kOmega`. The voltage gain of the amplifier isA. 2000B. 3000C. 4000D. 1000
Answer» Correct Answer - A We know voltage gain is, `A_(V)=beta(R_(L))/(R_(i))` On putting given values, `A_(V)=(2xx10^(-3))/(40xx10^(-6))xx(4xx10^(3))/(100) " " [because beta=(DeltaI_(C))/(DeltaI_(B))]` `A_(V)=2000`

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