Two long, straight, parallel wires 10 cm apart carry cur-rents in opposite directions.
(a) Use the right-hand source and force rules to determine whether the forces on the wires are (1) attractive or (2) repulsive. Show your reasoning.
(b) If the wires carry equal currents of 3.0 A, what is the magnetic field magnitude that each produces at the other’s location?
(c) Use the result of part (b) to determine the magnitude of the force per unit length they exert on each other.