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Question

A p-n junction ideal diode is in forward bias and a current of 20 mA flows through the circuit. When it is in reverse bias, the magnitude of the current is
  1. 30 mA
  2. Infinity
  3. 20 mA
  4. Zero

A
Infinity
B
Zero
C
20 mA
D
30 mA
Solution
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The reverse current is of the range of few micro-amperes hence cannot be measured with milliammeter. In milliammeter, it will show zero reading hence reverse current is zero here.

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