1. The problem statement, all variables and given/known data Two parallel whires, separated by a distance D (midpoint distance), are charged with a current density L (each whire has a radius R). If the whires have the potential +/- X Volts, what is the force per unit length between them? 2. Relevant equations B = μ0*I /(2πr) is describing the magnetic field at a distance r perpendicular from the whire. F=B×IL is describing the force 3. The attempt at a solution ?