Determine the resistance of a copper wire having a length of 1 km and
diameter or 0.5 mm
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Let ρ is resistivity of copper (ρ =1.72×10-8 Ω-m) , l is length and A is area of crosssection
Resistance of copper wire = ρ×l/A = 1.72×10-8 ×1000×4/(π×0.5×0.5×10-6) ≈ 87.6 Ω
Step-by-step explanation:
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