[SOLVED] Magnetic force on a charge carrying wire 1. The problem statement, all variables and given/known data A current carrying wire is in a magnetic field as shown below. The magnet is on a scale. Given this setup, does the scale read more or less weight? Explain using the Right Hand Rule and Newton's Third Law. Note: The apparatus depicted is a magnet sitting on the mass pan of a balance. 2. Relevant equations The RH rule is a bit long to explain here.. basically, the current is flowing W, and the magnetic force is N to S. Newton's 3rd: For every action, there is an equal and opposite reaction. 3. The attempt at a solution The wire is carrying current, but the current is not given. Current must be positive, so therefore it has a charge of >0. Positive current exerts a force upward based on the drawing, so the magnet will weigh less. I don't know how to explain this in terms of the RH rule, though. My best guess: With my thumb pointing in the direction of the current and fingers wrapped around the wire, the magnetic force flows N to S. My open palm would face left? right? up? down?, which corresponds to the force the magnet will feel. Because of Newton's Third Law, the weight will _____.