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Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronic: Material, Devices And Simple Circuits1 Mark
MCQ
In insulators________. (C.B is conduction band and V.B is valence band)
  • A
    V.B. is partially filled with electrons.
  • B
    C.B. is partially filled with electrons.
  • C
    C.B. is empty and V.B. is filled with electrons.
  • D
    C.B. is filled with electrons and V.B. is empty.
✓

Answer

  1. C.B. is empty and V.B. is filled with electrons.

Explanation:

As shown in the image, insulators have a very large forbidden gap. Their conduction band is empty, thus they cannot conduct electricity under normal room temperature and pressure conditions. The valence band is full.

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