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BITSAT2023PhysicsSemiconductorsActual

The effect of increase in temperature on the number of electrons in conduction band ( n _ e ) and resistance of a semiconductor will be as:

Options

  1. ABoth n _ e and resistance decrease
  2. BBoth n _ e and resistance increase
  3. Cn _ e increases, resistance decreases
  4. Dn_e decreases, resistance increases

Correct answer

C. n _ e increases, resistance decreases

Step-by-step solution

When temperature increases, more electrons excite to conduction band and hence conductivity increases, therefore resistance decreases.

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