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

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronic: Material, Devices And Simple Circuits1 Mark
MCQ
In insulator:
  • A
    Valence band is partially filled with electrons.
  • B
    Conduction band is partially filled with electrons.
  • C
    Conduction band is filled with electrons and valence band is empty.
  • ✓
    Conduction band is empty and valence band is filled with electrons.
✓

Answer

Correct option: D.
Conduction band is empty and valence band is filled with electrons.

Insulators are the materials which do not conduct electricity. All the electrons are filled in valance band whereas the conduction band is empty. Moreover, the energy band gap in insulators is very large, thus electrons cannot jump from valence band to conduction band.

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