1. The problem statement, all variables and given/known data A conductor (wire) is folded into a square loop with each side having a length of a. Total charge of Q is transfered onto the conductor. Describe the line charge density of the square loop in equilibrium. (If I am interpreting this correctly what is required is determining charge distribution along the wire.) 2. Relevant equations Guessing here: E=(1/4πε0)(dQ/r2) - electric field of a point charge 3. The attempt at a solution If charge distribution would be homogenus all of this would be easy. q=Q/(4a) But I take it this is not the case, correct? Perhaps taking into account that electric field component parallel to the wire at each point on the square equals zero since everything is in equilibrium would help? But I can not find a way to set any equations. Sum of electric fields caused by infinitesimal charges along the wire in the midle of the square equals zero. But again, I see no way of using that to set an equation which would show charge distribution along the wire. Since we are dealing with a square, symmetry probably helps out a lot and a solution for only a half of one side would solve everything. Correct? All help is greatly appreciated. Cheers!