Physics-Resistance & Resistivity
NEET Physics Resistance & Resistivity Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 12
Assertion (A): The resistivity of a semiconductor decreases with an increase in temperature. | Reason (R): In semiconductors, the number of free electrons per unit volume decreases with increasing temperature.
A
Both A and R are true and R is the correct explanation of A.
B
Both A and R are true but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option C
Detailed Explanation
The resistivity of semiconductors decreases with increasing temperature because the number of charge carriers (electrons) increases, not decreases, as temperature rises.
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