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MHT CET Medical202624 April 2026Evening ShiftPhysicsSemiconductorsActual

In case of semiconductors, the band gap between the valence band and conduction band is

Options

  1. Abetween 5 eV and 6 eV .
  2. Bbetween 10 eV and 11 eV
  3. C1 eV or less but greater than zero.
  4. Dzero.

Correct answer

C. 1 eV or less but greater than zero.

Step-by-step solution

In solid-state physics, materials are classified into conductors, insulators, and semiconductors based on the size of the forbidden energy gap ( E_g ) between the valence band and the conduction band. For conductors, the valence band and conduction band overlap, so the band gap is zero. For insulators, the forbidden energy gap is very large, typically greater than 3 eV to 5 eV, making it extremely difficult for electrons to jump to the conduction band. For semiconductors, the forbidden energy gap is small but non-z

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