What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to give an equivalent resistance of \(3\Omega\) ? (Given resistivities of iron and copper-nickel alloy wire are \(12\mathrm{μΩ}\mathrm{cm}\) and \(51\mathrm{μΩ}\mathrm{cm}\) respectively)

[JEE Main 2021, 26 Aug (Shift 1)]

Question

What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to give an equivalent resistance of \(3\Omega\) ? (Given resistivities of iron and copper-nickel alloy wire are \(12\mathrm{μΩ}\mathrm{cm}\) and \(51\mathrm{μΩ}\mathrm{cm}\) respectively)

[JEE Main 2021, 26 Aug (Shift 1)]

YESPYQ · Accepted Answer

Options are free to see. Unlock the correct answer and full explanation with PYQ Pass.

What equal length of an iron wire and a copper-nickel alloy wire, each of 2 mm diameter connected parallel to give an eq…

Practice more JEE Physics PYQs