The input resistance of a silicon transistor is \( 100 \Omega \) Base current is changed by \( 4...

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The input resistance of a silicon transistor is \( 100 \Omega \) Base current is changed by \( 40 \mu \mathrm{A} \) which results in a change in collector current by \( 2 \mathrm{~mA} \). This transistor is used as a common emitter amplifier with a load resistance of \( 4 \mathrm{k} \Omega \) The voltage gain of the amplifier is
(a) 2000
(b) 3000
(c) 4000
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