MHT CET Physics question

Not in JEE Advanced syllabus

Statement 1: The resistivity of a semiconductor increases with temperature Statement 2: In a conducting solid, the rate of collisions between free electrons and ions increases with increase of temperature

(A)Assertion is True, Reason is True; Reason is correct explanation for Assertion
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is TrueCorrect

Answer: (D)

Solution

For a semiconductor, heating breaks covalent bonds and the number of charge carriers rises sharply, so resistivity decreases and

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Question ID VK-085523