Calculate force per unit length between parallel current-carrying wires, determine attraction or repulsion, and analyse changing currents and multi-wire systems.
A cable consisting of many copper wires is used to transfer electrical energy from an alternating current (ac) generator to an electrical load. The copper wires are protected by an insulator.
The two cables in part (c) are suspended a constant distance apart. Explain how the magnetic forces acting between the cables vary during the course of one cycle of the alternating current (ac). be marked.