MHT CET Physics question
Statement 1: In a metre bridge experiment, null point for an unknown resistance is measured. Now the unknown resistance is placed 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
Answer: (D)
Solution
Statement 2 is true: the unknown resistance rises with temperature; for the null point to stay at the same place the ratio must remain unchanged, so
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