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In an insulator, the forbidden energy ga...

In an insulator, the forbidden energy gap between the valence band and conduction band is of the order of

A

`1 MeV`

B

`0.1 MeV`

C

`1 eV`

D

`5 eV`

Text Solution

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The correct Answer is:
D
A solid with completely filled valence band is an insulator, if the energy gap between the valence band and the empty conduction band is larger than about `5 eV`
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