When a diode is heavily doped the

Zener voltage will be low

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Avalanche voltage will be high

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Depletion region will be thin

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Leakage current will be low

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Solution

The correct option is A Zener voltage will be low
The value of reverse voltage at which this occurs is controlled by the amount ot doping of the diode. A heavily doped diode has a low Zener breakdown voltage, while a lightly doped diode has a high Zener breakdown voltage. At voltages above approximately 8V, the predominant mechanism is the avalanche breakdown.

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