question_answer

                An unknown transistor needs to be identified as npn or pnp type .A multi meter, with +ve and .ve terminals, is used to measure resistance between different terminals transistor. If terminal 2 is the base of the transistor then which of the following is correct for a pnp transistor?   JEE Main Online Paper (Held On 09 April 2016)

A) +ve terminal 3, .ve terminal 2, resistance high

B) +ve terminal 2, .ve terminal 3, resistance low

C) +ve terminal 1, .ve terminal 2, resistance high

D) +ve terminal 2, .ve terminal 1, resistance high

Correct Answer: D

Solution :

                when pn junction is forward biased resistance is law. When pn junction reverse biased resistance is high