Q.

Statement 1: In a meter bridge experiment, null point for an unknown resistance 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.
Statement 2: Resistance of a metal increases with increase in temperature.

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a

Statement 1 is true, Statement 2 is true; Statement 2 is not a correct explanation of Statement 1

b

Statement 1 is true, Statement 2 is false

c

Statement 1 is true, Statement 2 is true; Statement 2 is the correct explanation of Statement 1

d

Statement 1 is false, Statement 2 is true

answer is D.

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