Assertion :A pure semiconductor has negative temperature coefficient of resistance. Reason: On raising the temperature, more charge carriers are released, conductance increases and resistance decreases.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The resistance of semiconductor decreases with a rise in temperature because of negative temperature coefficient of resistance. The reason being, on raising the temperature, more charge carriers are released, conductance increases and resistance decreases.
So, both assertion and reason are correct and reason is the correct explanation of the assertion.

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