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

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in Physics – Class 12 by (135k points)
When a junction diode is reverse biased, what causes current across the junction?

(a) Diffusion of charges

(b) Nature of material

(c) Drift of charges

(d) Both drift and diffusion of charges

This question was addressed to me in an interview for job.

My query is from Semiconductor Diode in section Semiconductor Electronics : Materials, Devices and Simple Circuits of Physics – Class 12

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Best answer
The correct option is (c) Drift of charges

Explanation: 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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