question_answer

In the figure, given that supply can vary from 0 to and The minimum base current and the input voltage at which the transistor will go to saturation, will be respectively [JEE Main 12-Jan-2019 Evening]

A) and 3.5 V

B) and 3.5V

C)  and 2.8 V

D)  and 2.8 V

Correct Answer: B

Solution :

[b] Applying KVL at output and input circuit

At saturation,

Base current,

Using equation (i),