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C, Si and Ge have same lattice structure...

C, Si and Ge have same lattice structure. Why is C insulator,
while Si and Ge intrinsic semiconductors ?

Text Solution

Verified by Experts

The correct Answer is:
A
The energy gap between conduction band and valence band is least for Ge, followed
by Si and highest for C. Hence, number of free electrons are negligible for C. This is why carborn
is insulator.
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