Questions

Zener breakdown in a semiconductor diode occurs when

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Forward current exceeds certain value

Reverse bias exceeds certain value

Forward bias exceeds certain value

Potential barrier is reduced to zero

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detailed solution

Correct option is B

When reverse bias is increased, the electric field at the junction also increases. At some stage the electric field breaks the covalent bond, thus the large number of charge carriers are generated. This is called Zener breakdown.

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