1. The problem statement, all variables and given/known data A copper conductor with a cross-section of A and a lenght of is connected to a battery with a electromotive force of U. The resistance of the conductor is R, and the internal resistance of the battery is negligible. U = 220 V l = 10 m A = 10 mm2 R = 0.01695 [tex]\Omega[/tex] Determine the average speed of the electrons! 3. The attempt at a solution I know the electric current. But I have no idea how many electrons are moving. I'm not a native speaker. I may have grammer mistakes.