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21 January, 19:18

A 0.40 ohms resistor is made from a wire of length 5m and resistivity 2*10-6 ohms m what is the cross sectional area of the wire

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  1. 21 January, 21:43
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    25*10⁻⁶ m² or 25 mm²

    Explanation:

    R = ρL/A

    0.40Ω = (2*10⁻⁶ Ωm) (5 m) / A

    A = 25*10⁻⁶ m²

    A = 25 mm²
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