Discussion :: Materials and Components
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Assertion (A): The resistance of a copper specimen changes by about 22% when temperature is increased from room temperature to 700°C.
Reason (R): The physical properties of a material are determined mostly by the extent of impurities.
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A.
Both A and R are true and R is correct explanation of A
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B.
Both A and R are true but R is not correct explanation of A
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C.
A is true but R is false
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D.
A is false but R is true
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Answer : Option B
Explanation :
The increase of resistance with temperature is governed by temperature coefficient of resistance.
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