1. The problem statement, all variables and given/known data A magnet is suspended so that it is free to swing above a coil that is connected to a power supply. A pointer has been attached to the magnet so that a small swing of the magnet will result in a large deflection of the pointer. When there is no current through the coil, the magnet is horizontal and the pointer is vertical. What is the deflection of the pointer (if any) when the switch on the power supply is closed? What happens to the pivot as the current through the coil is varied? 2. Relevant equations Faraday's law = E = -d(magflux)/dt magnet flux = BAcos(theta) 3. The attempt at a solution When the switch on the power supply is closed, this means that there is no current. This means that there will be no deflection of the pointer. Is this correct? What does it mean by the switch is closed?