Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: The resistivity of a semiconductor increases with temperature. Reason: The atoms of a semiconductor vibrate with larger amplitudes of higher temperatures thereby increasing its resistivity.A) if the Assertion and Reason are true and Reason is the correct explanation of Assertion
B) if both Assertion and Reason are true but Reason is not the correct explanation of Assertion
C) if Assertion is true but Reason is false
D) if both Assertion and Reason are false
Correct Answer: D
Solution :
Resistivity of a semiconductor decreases with the temperature. The atoms of a semiconductor vibrate with larger amplitudes at high temperatures thereby increasing its conductivity not resistivity.
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