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This question has statement I and statement II. Of the four choices given after the statements, choose the one that best describes the two statements. Statement- I: In a meter bridge experiment, the null point for the unknown resistance is measured. Now, the 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- II: Resistance of a metal increases with temperature.

$\begin {array} {1 1} (A)\;Both\: the\: statements \: are\: true,\: Statement – II \: is\: not\: the \: correct \: explanation \: of\: Statement–I.\\ (B)\; Statement – I\: is\: true,\: statement – II\: is\: false. \\ (C)\;Statement – I\: is\: false,\: Statement – II \: is\: true \\ (D)\; Both \: the\: statements\: are\: true,\: Statement – II \: is \: the\: correct\: explanation\: of \: statement- I \end {array}$

The resistance of the metal increases.
Hence, the value of the standard resistance must also increase.
Ans : (D)
edited Mar 14, 2014