A working transistor with its three legs marked P, Q and R is tested using a multimeter. No conduction is found

Question:

A working transistor with its three legs marked $P, Q$ and $R$ is tested using a multimeter. No conduction is found between $P$ and $Q$. By connecting the common (negative) terminal of the multimeter to $R$ and the other (positive) terminal to $P$ or $Q$, some resistance is seen on the multimeter. Which of the following is true for the transistor?

  1. It is an npn transistor with $R$ as base

  2. It is a pnp transistor with $R$ as base

  3. It is a pnp transistor with $R$ as emitter

  4. It is an npn transistor with $R$ as collector

Correct Option: 2

JEE Main Previous Year 1 Question of JEE Main from Physics Semiconductors chapter.
JEE Main Previous Year 2008

Solution:

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