1. The electrical current through a wire is (a) the charge per second (coulombs/s) past a point in the wire. (b) the total charge in the wire (c) the change in potential energy of a charge moved between the two ends of the wire

3. n = no. of conduction electrons per unit volume -e = charge on the electron Which of the following equations is correct?

4. 4. (Points: 2) The seemingly instantaneous increase in electric current in a wire when a switch is closed can be understood in terms of: a. the propagation of an electric field down the wire with nearly the speed of light b. the acquisition of drift velocities by all free electrons almost instantaneously c. a very large number of charges slowly drifting down the wire d. the replacement of charge flowing out of the wire at one end by charge entering the wire at the other end e. all of the above