Question

In a transistor the base is very lightly doped as compared to the emitter because by doing so

• A. The flow across the region is mainly because of holes.
• B. The flow across the base region is mainly because of electrons.
• C. Recombination is decreased in the base region.
• D. Base current is high.

Answer 1

The correct option is C Recombination is decreased in the base region.

In most transistors, the emitter is heavily doped. Its job is to emit or inject electrons into the base.

The bases are lightly doped and very thin so that recombination of charge carriers decreases in base section and most of the emitter - injected charge carriers passes on the collector side.

Hence, $\left(\text{C}\right)$ is the correct answer.