A transistor is operated in common emitter configuration

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A transistor is operated in common emitter configuration at V_C = 2V such that a change in the base current from 100 µA to 300 µA produces a change in the collector current from 10 mA to 20 mA. The current gain is

1. 50
2. 75
3. 100
4. 25

Correct Option: A

The current gain

β =	ΔI_C	=	10 mA	×	10 × 10³	= 50
	ΔI_B		200 μA		200