Question

A resistance wire is stretched to double its length so that its area of cross section is halved.how will its resistance change will any change be observe in its resistivity?justify your answer


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Answer 1

(a) Here, length is doubled and area of cross-section is halved. ... (b) Resistivity of a substance does not depend on its length or area of cross-section. It depends on the nature of the material and temperature. Hence there is no change.