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Question 6 A copper wire has diameter 0.5 mm and ...

Diameter = 0.5 mm = 0.0005 m. Resistance, R=10 Ω We know that. R=ρlA l=RAρ =10×3.14×(0.00052)21.6×10−8 =10×3.14×254×1.6=122.7 ∴ length of the wire = 122.7 ...

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