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Forbidden energy gap in a semiconductor is

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Forbidden energy gap in a semiconductor is
A. 1 eV
B. 6 eV
C. 0 eV
D. 3 eV
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Correct Answer - D
For a semiconductor, `0 lt E_(g) le 3eV`
For metals `E_(g)~0` and for insulators `E_(g) gt 3eV`.
forbidden energy gap in semiconductor is maximum energy gap allowed.
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