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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A copper wire of cross-sectional area 3.00×10^−6 m^2 carries a current 10.0A. a. Find the drift speed of the electrons in the wire. Assume that each copper atom contributes one free electron to the body of material. b. Find the average time between collisions for electrons in the copper at 20∘C. The density of copper si 8.95gcm−1, molar mass of copper is 63.5gmol−1, Avogadro number is 6.02 x 1023 electrons per mol and resistivity of copper is 1.7 xx10^(-8) Omega.`

A copper wire of cross-sectional area 3.00×10^−6 m^2 carries a current 10.0A. a. Find the drift speed of the electrons in the wire. Assume that each copper atom contributes one free electron to the body of material. b. Find the average time between collisions for electrons in the copper at 20∘C. The density of copper si 8.95gcm−1, molar mass of copper is 63.5gmol−1, Avogadro number is 6.02 x 1023 electrons per mol and resistivity of copper is 1.7 xx10^(-8) Omega.`

and V is drift velocity. Current is flowing from a conductor of nonuniform cross sectional area. If A1>A2 j is current density then find relation between a.) i1 and i2 b.) j1 and j2 c.) (vd)1 and (vd)2 (drift velocity) where I is current