What is the resistance of a 11 cm -long piece of iron with a 1.5 mm × 1.5 mm square cross section?

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  • oubaas
    Lv 7
    7 months ago
    Favorite Answer

    Iron resistivity ρi = 97.1*10^-3 ohm*mm^2/m

    R = ρi*ℓ/s = 97.1*10^-3*0.11/2.25 = 0.0047 ohm

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  • 7 months ago

    (0.11 m) / (0.0015 m)^2 * (resistivity of iron in Ωm)

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