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19 February, 17:18

Given a wire with a cross section of. 45cm^2, a length of 3cm, and an internal resistance of 3 ohms, show your 5 steps to solve for the resistivity of the wire

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  1. 19 February, 18:23
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    Resistance ∞ (proportional) length

    resistance ∞ 1 / area

    therefore,

    (the constant that we take is known as the resistivity)

    resistance = (resistivity*length) / area

    resistivity = (resistance * area) / length

    = (3 * 45) / 3 = 135/3 = 45 Ωm

    in short your answer is 45 Ωm
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