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Q.

Regarding a semiconductor which one of the following statements is wrong?

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a

The charge carriers are electrons and holes .

b

There are no free electrons at 0 K.

c

The number of free electrons increases with rise of temperature 

d

There are no free electrons at room temperature.

answer is A.

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Detailed Solution

There are no free electrons at 0 K as semiconductors behaves as insulator at this temperature.

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