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MHT CET20227 Aug 2022Morning ShiftPhysicsSemiconductorsActual

Identify the WRONG statement from the following. In an intrinsic semiconductor

Options

  1. AThe number of free electrons is less than that in a conductor.
  2. BThe number of free electrons increases with temperature.
  3. CThere are no free electrons at any temperature except absolute zero.
  4. DThere are no free electrons at absolute zero temperature.

Correct answer

C. There are no free electrons at any temperature except absolute zero.

Step-by-step solution

Concept based. At zero Kelvin semiconductor becomes perfect insulator. Therefore, no free electrons at zero Kelvin.

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