Home Physics Units, Dimensions and Measurement JEE Main 2023 - ( Mathematics In Physics ) The length of a metallic wire is increased b…
Physics Units, Dimensions and Measurement JEE Main 2023 - ( Mathematics In Physics ) MCQ (Single Correct)

The length of a metallic wire is increased by 20% and its area of cross-section is reduced by 4%. The percentage change in resistance of the metallic wire is

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The given data is

Using the formula , the new resistance is

Hence, the percentage increase is

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