Magnetic force exerted by the magnetic field on a current-carrying wire A...

Magnetic force exerted by the magnetic field on a current-carrying wire

A 500-turn coil of wire is hinged to the top of a table, as shown in Figure P17.15. Each side of the movable part of the coil has a length of 0.50 m. (a) In which direction should a magnetic field point to help lift the free end of the coil off the table? (b) Determine the torque caused by a 0.70-T field pointing in the direction described in part (a) when there is a 0.80-A current through the wire and when the coil is parallel to the table.