PHYSICS For transistor action, which of the following state…

Biology NEET Previous Year Question Paper NEET 2020 Previous Year Question Paper Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 21, 2026

PHYSICS

For transistor action, which of the following statements is correct?

Both emitter junction as well as the collector junction are forward biased.

The base region must be very thin and lightly doped.

Base, emitter and collector regions should have same doping concentrations.

Base, emitter and collector regions should have same size.

Text Solution

Verified by Experts

The correct answer is:

As we know, for Bi-polar junction transistor

The length of each section of transistor is in order as shown above,

i,e., Lc > L E > L B

and doping profile is Emitter > Collector > Base

Whereas, for transistor action Base-emitter junction is forward biased and Base-collector junction is reversed biased.

Hence from this we can conclude that, for transistor action the base region must be very thin and lightly doped.

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