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MHT CET202525 Apr 2025Evening ShiftPhysicsSemiconductorsActual

A piece of semiconductor is connected in series in an electric circuit. On increasing the temperature, the current in the circuit will

Options

  1. Adecrease.
  2. Bremain unchanged.
  3. Cincrease.
  4. Dstop flowing.

Correct answer

C. increase.

Step-by-step solution

Semiconductor resistance decreases with increasing temperature due to enhanced carrier generation. The negative temperature coefficient implies dR dT Given constant voltage V , Ohm's law I = V/R shows that current increases as resistance decreases. Since R(T) is decreasing with temperature, I(T) must increase. The current in the circuit will therefore increase with temperature.

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