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The probbility of electrons to be found in the conduction band of an intrinsit semiconductor at a finile temperatureA. increase exponenially with increases band gapB. decreases exponenially with increases band gapC. decreases with increases temperatureD. is independent of the temperature and the band gap |
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Answer» Correct Answer - B KEY CONCEPT: For a semi condactor `n = n_(0)e^(bar Eg//kT)` where `n_(0) = no ` of free electrons at absolute zero `n = no` of free electron at T kelvin, E_(g)= Energy gap , k = Boizmana constant` . As E_(g) ` increase , `n` decrease exponentially. |
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