What will be the resistance if the length doubled and area halved
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The resistance of a conductor is directly proportional to its length (L) as R ∝ L. Thus doubling its length will double its resistance, while halving its length would halve its resistance.
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If the length of the conductor is doubled then the resistance would increase by 8 times.
Since length becomes 2l and the cross-sectional area becomes 14th. Hence, almost the new resistance of the conductor increases by 4 times.
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