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Zener diode works on the principle of:
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- tunneling of charge carriers across the junction
- thermionic emission
- diffusion of charge carriers across the junction
- hoppling of the charge carriers across the junction
Correct Option: A
In zener diode the carriers are accelerated by electric field. When they collide with atoms they ionize the atom due to their kinetic energy. Hence an avalanche break down occurs due to the large increase in the number of carriers.
Hence alternative (A) is the correct choice.
