How does the resistance of a wire depend on its radius? Explain your answer.
How does the resistance of a wire depend on its radius? Explain your answer.
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Resistance of a wire is inversely proportional to the area of cross-section of the wire.
R ∝ 1/A
R ∝ 1/πr2
This means if a wire of same length, but of double radius is taken, its resistance is found to be one-fourth.
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