Question

Potential barrier of a p-n junction

• A. opposes diffusion current
• B. supports drift current
• C. neither opposes nor supports diffusion current
• D. both A and B

Answer 1

The correct option is D both A and B

Diffusion current in a junction diode is a current due to the diffusion of charge carriers (holes-electrons).

Drift current is current due to the force exerted on charge carriers by electric field.

A potential barrier, opposes the diffusion of charge carriers from one region to other hence opposes the charge carriers, whereas, supports the drift current.