1.

Electric field is applied to a semiconductor. In it density of conducting charge is n the drift velocity is v. Now increasing the temperature of semiconductor ……..

Answer»

v and nincreases
v and n decreases
v increases and n remaining CONSTANT
v decreases and n increases

Solution :v decreases and n increases
INCREASING the temperature more covalent bonds are broken and NUMBER of FREE electrons and holes are increases so n increases. Now increasing the temperatureso n increases. Now increasing the temperature oscillation of charge CONDUCTORS also increasesso drift velocity decreases.


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