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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
When an electric field is applied across a semiconductor:
  • A
    Electrons move from lower energy level to higher energy level in the conduction band.
  • B
    Electrons move from higher energy level to lower energy level in the conduction band.
  • C
    Holes in the valence band move from higher energy level to lower energy level.
  • ✓
    A and C both
✓

Answer

Correct option: D.
A and C both
Solution:
As we apply electric field is applied across a semiconductor, the electrons in the conduction band acquire energy and get accelerated. They travel from lower energy level to higher energy level. While the holes in valence band travel from higher energy level to lower energy level, where they will be having more energy.

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