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How does the resistance of a wire vary w...

How does the resistance of a wire vary with its area of cross-section? Explain.

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The resistance of a wire is inversly proportional to its area of cross-section `i.e., R prop 1/A`.
Thus. if the wire is thick (large area of cross-section), then its resistance is less. If the wire is thin (less area of cross-section), then its resistance is large.
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