1. The problem statement, all variables and given/known data Take a wire, and form it into a rectangular loop. It carries a current I. What should its dimensions be, and how should it be placed inside of a magnetic field to maximize the torque on it? 2. Relevant equations tau = NIAB sin theta 3. The attempt at a solution There's no answer to this in my book, but shouldn't the dimensions just be L/4 by L/4 (a square), and it's perpendicular to the field?