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BITSAT2022PhysicsSemiconductorsActual

For an insulator, the forbidden energy gap is

Options

  1. AZero
  2. B1 eV
  3. C2 eV
  4. D5 eV

Correct answer

D. 5 eV

Step-by-step solution

For an insulator, E_ g >3 eV , that is why electron transition from valence band to conduction band is not possible. For semiconductor E_ g is 0.2 eV to 0.3 eV , while for metals E_g>5 eV .

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