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 \\mu\\Omega{\cm} and 51 \\mu\\Omega{\cm} respectively) [26 Aug 2021 Shift 1]

JEE Main 26-Aug-2021 Shift 1 Solved Paper

Section: Physics

Question : 16 of 90

Marks: +1, -0

What equal length of an iron wire and a copper-nickel alloy wire, each of 2‌mm diameter connected parallel to give an equivalent resistance of 3Ω?
(Given, resistivities of iron and copper-nickel alloy wire are 12μΩ‌cm and 51μΩ‌cm respectively)

[26 Aug 2021 Shift 1]

82m
97m
110m
90m

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