46. •• A set of jumper cables used to start a car from another car’s battery is connected to the terminals of both batteries. If 15 A of current exists in the cables at some instant during the starting procedure and the cables are parallel and 15 cm apart,

(a) do the wires repel or attract? Explain.

(b) What is the magnetic field strength that each wire produces at the location of the other?

(c) What is the force per unit length on the cables?