Question

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 100A to 150A produces a change in the collector current from 5mA to 10mA. The current gain is

• A. 25
• B. 50
• C. 75
• D. 100

Answer 1

The correct option is D 100

The base current changes from $100\mu A$ to $150\mu A$ and produces a change in the collector current from $5mA$ to $10mA$

The change in collector current is $5mA$

The change in base current is $50\mu A$

The current gain is $\frac{5000}{50}=100$

Therefore option $D$ is correct