| ASSERTION: Material used in the construction of a standard resistance is constantan or magnanin. |
| REASON: Temperature coefficient of constantan is very small. |
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: A
Solution :
These alloys (Constantan or manganin) are used for making standard resistance because they possess high resistivity and low temperature coefficient of resistance.
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