Hi. I'm doing an experiment and i'm kinda stuck. I know that a current produces a magnetic field. In this experiment there is a current carrying wire (copper) and a permanent magnet suspended above it. Deflection is being measured as the current is varied. I know that both magnetic fields will interact and that a force would be exerted on the permanent magnet (as it is suspended and the wire statioonary). The force would therefore be dependant on the magnitude of the current as well as the magnetic flux density. So the eqn explaining this is F= BIl? I could be wrong. Does this then mean that the permanent magnet cuts the magnetic field of the wire? As the wire would be stationary, hence parallel to the magnetic field of the permanent magnet? If so, would the angle made by the magnet cause the Force to be determined by F= BIl (sin theta)?