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Question
Assertion :The resistivity of the semiconductor increases with temperature. Reason: In conducting solid the rate of collision between the free electrons and ions increases with increase of temperature
Assertion :The resistivity of the semiconductor increases with temperature. Reason: In conducting solid the rate of collision between the free electrons and ions increases with increase of temperature
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Solution
The correct option is D Assertion is incorrect and Reason is correct
The conductivity of the semiconductor increases with temperature. Because upon an increase in temperature the atoms within the thermistor would vibrate with more energy and therefore more vigorously, hence making the electrons flowing through the electric circuit more likely to collide with one of the atoms, so increasing conductivity. Therefore, resistivity decreases with increased temperature.
So, assertion is incorrect but reason is correct.
The conductivity of the semiconductor increases with temperature. Because upon an increase in temperature the atoms within the thermistor would vibrate with more energy and therefore more vigorously, hence making the electrons flowing through the electric circuit more likely to collide with one of the atoms, so increasing conductivity. Therefore, resistivity decreases with increased temperature.
So, assertion is incorrect but reason is correct.
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