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Question

When the p-n junction diode is reverse biased, the thickness of the depletion layer
  1. decreases
  2. increases
  3. becomes zero
  4. remain constant

A
decreases
B
becomes zero
C
increases
D
remain constant
Solution
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The width of the depletion layer in a p-n junction diode increases in reverse bias as charge carriers are swept into battery terminals, holes from p-type into negative terminal and electrons from n-type into positive terminal.

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