JEE PHYSICS MCQ: CURRENT ELECTRICITY

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Application +4 | -1

A thick wire is stretched, so that its length become two times. Assuming that there is no change in its density, then what is the ratio of change in resistance of wire to the initial resistance of wire?

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Correct option: C

\begin{array}{llllllllllllllllllll} {\mathrm{3 : 1}} \end{array}

Option C (3 : 1) is correct because when the length doubles, the resistance increases by a factor of 4, resulting in a change of 3 times the original resistance.

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