an electric current of 1.00 A is flowing through a copper filament diameter 1.00 mm, number of conduction electrons per unit volume 8.4 x 10^ 28 m^-3.
a) calculate the average electron velocity v and the ?- factor, the positive and negative charge densities in the S' frame, and the charge density surplus.
b) calculate (in the S frame) the Lorentz force and (inthe S' frame) the columb force exerted on an elementary charge moving at velocity v parallel to, and at a distance of 1.00 cm from, the axis of filament.