1.

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

Answer»

Solution :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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