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JEE PHYSICS MCQ: SEMI CONDUCTOR DEVICES
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Medium
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Assertion: For a conductor resistivity increases with increase in temperature.
Reason: Since , when temperature increases the random motion of free electrons increases and vibration of ions increases which decreases .
Reason: Since , when temperature increases the random motion of free electrons increases and vibration of ions increases which decreases .
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Correct option: A
If both assertion and reason are true and reason is the correct explanation of assertion
Option A (If both assertion and reason are true and reason is the correct explanation of assertion) is correct because increased temperature leads to increased resistivity due to decreased relaxation time.
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