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.

Both A and R are true and R is correct explanation of A

Both A and R are true but R is not correct explanation of A

Assertion (A): The resistance of a copper specimen changes by about 22

1.	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.
A.	Both A and R are true and R is correct explanation of A
B.	Both A and R are true but R is not correct explanation of A
C.	A is true but R is false
D.	A is false but R is true
Answer» C. A is true but R is false

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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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