In household wiring

PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity

Problem

In household wiring, copper wire of diameter 2.05 mm2.05\,\mathrm{mm} is often used. Find the resistance of a 35.0 m35.0\,\mathrm{m} long wire. The resistivity of copper is 1.72×10−8 Ω⋅m1.72\times10^{-8}\,\Omega\cdot\mathrm{m}.

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