The conductivity of a semi conductor can be increased by:
A
Heating the semi conductor
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B
Doping the semi conductor
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C
Both (a) and (b)
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D
None
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Solution
The correct option is C Both (a) and (b) The conductivity of a semi-conductor can be increased by releasing the electrons which are bounded by atoms initially by heating the semi-conductor.
The conductivity of semi-conductor can also be increased by adding the trivalent or pentavalent impurity in a semi-conductor which is called as doping in a semiconductor.