A transistor is used as a common emitter amplifier with a load resistance of 2 k Ω . The input resistance is 150 Ω . Base current is changed by 20 μ A which results in a change in collector current by

Question

A transistor is used as a common emitter amplifier with a load resistance of 2 k Ω . The input resistance is 150 Ω . Base current is changed by 20 μ A which results in a change in collector current by 1.5 m A . The voltage gain of the amplifier is

TestHub · Accepted Answer

Voltage gain = V 0 V i = R 0 × ∆ I C R i × ∆ I B = 2000 × 1.5 × 10 − 3 150 × 20 × 10 − 6 = 3 3000 × 10 − 6 = 1 ( 1000 ) − 1 = 1000

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