Statement I: In a meter bridge experiment, null point for an unknown resistance is measured. Now, the unknown higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance.
Statement II: Resistance of a metal increases with the increases in temperature.

Options

A. Statement-I is True, Statement-II is True and Statement-II is a correct explanation for Statement-I
B. Statement-I is True, Statement-II is True and Statement-II is NOT a correct explanation for Statement-I
C. Statement-I is True, Statement-II is False
D. Statement-I is False, Statement-II is True

Explanation

With increase in temperature, the value of unknown resistance will increase. In balanced Wheat stone bridge condition
`R/X=l_1/l_2`
Where, R = value of standard resistance, X = value of unknown resistance.
To take null point at same point or `J_1/J_2` to remain unchanged,`R/x` should also remain unchanged.Therefore, if X is increasing R, should also increase.