Calculate the area of cross section of a wire of length 2m- its resistance is 25- and the resistivity of material of wire is 1-84-10-6 -m

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Question

Calculate the area of cross section of a wire of length 2m, its resistance is 25Ω and the resistivity of material of wire is 1.84*10-6 Ωm

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r_{1} = 2.5 cm

r_{2} = 4 cm

ρ = 2 \times 10^{- 3} Ω m

10 cm

10^{- 7} Ω m

10^{- 6} m^{2}

i = 0.1 A

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