A reverse biased pn junction has a resistance of the order of:

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MPMKVVCL Bhopal JE Electrical 24 August 2018 Official Paper
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  1. Ohms
  2. Kilo ohms
  3. Mega ohms
  4. Giga ohms

Answer (Detailed Solution Below)

Option 3 : Mega ohms
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Forward biasing of diode

  • A diode conducts when the positive terminal of the battery is connected to the anode and the negative terminal of the battery is connected to the cathode. Under this condition, the diode is said to be in a forward-biased condition.
  • In forward-biased conditions, the diode is replaced by short-circuit.
  • The resistance during forward-biased conditions is the order of μΩ.

Reverse biasing of diode

  • A diode does not conduct when the positive terminal of the battery is connected to the cathode and the negative terminal of the battery is connected to the anode. Under this condition, the diode is said to be in a reverse-biased condition.
  • In reverse-biased conditions, the diode is replaced by an open circuit.

The resistance during reverse-biased conditions is the order of Mega ohms (MΩ).

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