Q.

The forbidden energy band gap in conductors, semiconductors and insulators are EG1, EG2 and EG3

respectively. The relation among them is

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a

EG1 = EG2 = EG3

b

EG1 < EG2 < EG3

c

EG1 > EG2 > EG3

d

EG1 < EG2 > EG3

answer is B.

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Detailed Solution

In insulators, the forbidden energy gap is very large. In case of semiconductor it is moderate and in conductors the energy gap is zero.

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The forbidden energy band gap in conductors, semiconductors and insulators are EG1, EG2 and EG3respectively. The relation among them is