I have a test in a few hours, and my professor gave us a practice test, and I'm stuck. Could you give me a hint as to how to approach this problem, equations I could use. It's an algebra based class so I'd avoid using calculus equations. Thank you.
Three thin infinite wires carrying currents I in the same direction go perpendicularly to the paper sheet that they intersect at the points forming an equilateral triangle of side L. Calculate the force acting on each wire per unit length. What is the direction of the forces?