Force Between Two Parallel Current-Carrying Wires · IPhO 2005 #3

Physics · magnetostatics

Problem

Two infinitely long parallel wires separated by distance

d = 0.10\;\text{m}

carry currents

I_1 = 10\;\text{A}

and

I_2 = 20\;\text{A}

in the same direction. Find the force per unit length between them and state whether it is attractive or repulsive.