question_answer

A common emitter amplifier circuit, built using an npn transistor, is shown in the figure. Its dc current gain is and

What is the minimum base current for  to reach saturation? [JEE Main 8-4-2019 Afternoon]

A)

B)

C)

D)

Correct Answer: A

Solution :

[c]

At saturation state, becomes zero

now current gain factor