Q. A zener diode works on the principle of_

A
tunneling of charge carriers across the junction
B
thermionic emission
C
diffusion of charge carriers across the junction
D
hopping of charge carriers across the junction
Solution:

Due to zener effect in reverse bias under high electric field strength, electron quantum tunneling occurs. It? a mechanical effect in which a tunneling current occurs through a barrier. They usually cannot move through that barrier.

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