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  • 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 va

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.
D. holes in the valence band move from lower energy level to higher energy level.

Answers (1)

The answer is the option (a, c)

The electrons in the valence band are not able to gain energy from the external electric field. While the electrons in the conduction band can gain energy from the external field. In semiconductors, when an electric field is applied, the electrons in the conduction band are accelerated and gain energy. The movement is from lower energy level to higher energy level. The movement of holes in the valence band is from higher energy level to lower energy level. Here they will have more energy.

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