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Questions  

In a semiconductor,

a
there are no free electrons at any temperature
b
the number of free electrons is more than that in a conductor
c
there are no free electrons at 0 K
d
none of these

detailed solution

Correct option is C

At 0 K, semiconductor behaves as an insulator.

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What will be the conductivity of pure silicon crystal at 300 K temperature if electron cotter pair at this temperature is  1072×1010/cm3 and μn=1350cm2/Vs and μp=480cm2/Vs?


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