First slide

P-N junction diode

Question

When a junction diode is reverse biased, what causes current across the junction?

Easy

A

Diffusion of charges
B

Nature of material
C

Drift of charges
D

Both drift and diffusion of charges

Solution

The reverse current is mainly due to the drift of charges. It is due to the carriers like holes and free electrons passing through a square centimeter area that is perpendicular to the direction of flow.

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