Question

HOW would RESISTANCE of a wire get Effected if it's diameter is halved

Answer 1

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Answer 2

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Resistance is proportional to length - When wire length becomes half, the resistance becomes half.

Resistance is inversely proportional to cross sectional area; Diameter, becomes half, area reduces by Square of diameter i.e 1/4 times; Therefore, resistance becomes 4 times more.

Keeping points 1 and 2 together, the resistance becomes double

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