A cylindrical aluminum wire of diameter d=0.9 mm runs electric current I=2.32 A. Find the drift velocity vd of conduction electrons corresponding to this current: vd= mm/s. What is the strength E of the electric field in the wire that causes this current?: E= V/m. To make things certain, let us use aluminum's mass density of 2.7 g/cm3 and resistivity = 2.82 10-8 Ω·m. The atomic mass of aluminum is 4.48 10-26 kg. You can assume that each atom supplies one conduction electron.

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.