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MHT CET2010PhysicsSemiconductors

LED is a p-n junction diode which is

Options

  1. Aforward biased
  2. Beither forward biased or reverse biased
  3. Creverse biased
  4. Dneither forward biased nor reverse biased

Correct answer

A. forward biased

Step-by-step solution

When a junction diode is forward biased, energy is released at the junction due to recombination of electrons and holes. In the junction diode made of gallium arsenide or indium phosphide, the energy is released in visible region. Such a junction diode is called a light emitting diode or LED.

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