A transistor is operated in common emitter configuration

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A transistor is operated in common emitter configuration at constant collector voltage V_c = 1.5V such that a change in the base current from 100 µA to 150 µA produces a change in the collector current from 5 mA to 10 mA. The current gain (β) is

1. 75
2. 100
3. 50
4. 67

Correct Option: B

ΔI_b = +50μA, ΔI_c = 5 × 10^-3 A

β =	ΔI_c	=	5 × 10^-3	=	5 × 1000	= 100
	ΔI_b		50 × 10^-6		50