College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 17

Two parallel wires separated by 4.0 cm repel each other with a force per unit length of 2.0 × 10 4 N/m. The current in one wire is 5.0 A. (a) Find the current in the other wire. (b) Are the currents in the same direction or in opposite directions (c) What would happen if the direction of one current were reversed and doubled