A silver wire has a diameter of 0.4mm it is used to make a resistance of 1ohm if the resistivity of silver is 1.6×10-⁸ohm m calculate the length of wire needed
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Explanation:
R = ρ l/A
l= R * A /ρ
= 1 * π * (2*10^-4)^2/ 1.6×10-⁸
= 7.855 m
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this is your answer
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