An aluminium (resistivity \rho=2.2 \times 10^{-8} Ω-m) wire of a diameter 1.4 {\mm} is used to make a 4 Ω resistor. The length of the wire is

EAMCET Engineering 2007 Solved Paper

Section: Physics

Question : 32 of 160

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An aluminium (resistivity ρ=2.2×10−8Ω-m) wire of a diameter 1.4‌mm is used to make a 4Ω resistor. The length of the wire is

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