Question

a wire of length/and resistance R is stretched so that is double and the area of Cross section is halved how will its resistance change and resistivity change

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Answer 1

Answer:

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. Also the resistance of a conductor is inversely proportional to its cross-sectional area (A) as R ∝ 1/A.