Assertion (A): In a Meter Bridge experiment, null point for an unknown resistance made of metal is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance in the other gap.
Reason (R) : Resistance of a metal increases with increase in temperature.
In the light of the above statements, choose the most appropriate answer from the options given below:

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(A) is true but (R) is false

(A) is false but (R) is true

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is NOT the correct explanation of (A)

answer is D.

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Detailed Solution

With increase in temperature, resistance of metal wire increases, but balance conduction will not change.

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