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Question
With reference to a semiconductor diode, what is meant by:
(i) Forward bias
(ii) Reverse bias
(iii) Depletion region
Solution
(i) Forward bias: When a battery' is connected to a p-n diode such that the current is in the direction of diode current, the arrangement is called forward bias.
(ii) Reverse bias: If the current flows opposite to the direction of diode current, this is called reverse bias.
(iii) Depletion region: In a p-n diode, the region in which electrons and holes neutralize each other is called depletion region or zone.
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