A copper wire carries a current of 10 A. It has cross-sectional area of 0.05 cm 2 . Density of copper is 8.9 g / cm 3 . Molar mass of copper is 63.5 × 1 0 − 3 kg / mol . The drift speed of the electro

Question

A copper wire carries a current of 10 A. It has cross-sectional area of 0.05 cm 2 . Density of copper is 8.9 g / cm 3 . Molar mass of copper is 63.5 × 1 0 − 3 kg / mol . The drift speed of the electrons is closest to

TestHub · Accepted Answer

A = 5 × 1 0 − 6 m 2 ρ = 8.9 × 1 0 3 kg/ m 3 M = 63.5 × 1 0 − 3 kg/mol n = M ρ N A ​ ​ = 8.43 × 1 0 28 m − 3 I = n e A v d ​ v d ​ = n e A I ​ v d ​ = 1.48 × 1 0 − 4 m/s Option (A) ​

Physics - Current Electricity Question with Solution | TestHub

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