A metallic wire is elongated by of its original length

PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity

Problem

A metallic wire is elongated by 10%10\% of its original length, keeping volume constant. The percentage change in its resistance is (a) 10 \% increase (b) 0 \% change (c) 21 \% increase (d) 20 \% increase

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