A common emitter amplifier has a current gain 75. The collector resistance is 4 kΩ and the input resistance is 500 Ω. The voltage gain of amplifier is:

600

The correct answer is Option (2) → 600

The voltage gain ($A_V$) of a common emitter amplifier is -

$A_V=β×\frac{R_C}{R_{in}}$

where,

$β$ = current gain = 75

$R_C$, Collector resistance = 4000 Ω

$R_{in}$, Collector resistance = 500 Ω

$A_V=75×\frac{4000}{500}=75.8=600$