| ASSERTION: The temperature coefficient of resistance is always positive only for metals. |
| REASON: On increasing the temperature the resistance of metals and alloys increases. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and 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.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
The value of temperature coefficient of resistance is positive only for metals and alloys and is negative for semi conductors and insulators.
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