Two long parallel wires each carry 2.4 A in the same direction, with their centers 2.0 cm apart.
A) Find the magnitude of the magnetic field halfway between the wires.
B) Find the magnitude of the magnetic field at a point in the same plane as the wires, 2.0 cm from one wire and 4.0 cm from the other.
C) Find the magnitude of the force of interaction (per lenght) between the wires.