A horizontal straight wire of length 1.30 m and carrying a current of 3.7 A is placed in a uniform vertical magnetic field of 0.110 T. Find the size of the magnetic force that acts on the wire.
(b) Two students standing 12.0 m apart rotate a conducting skipping rope at a tangential speed of 8.2 m/s. The vertical component of the Earth’s magnetic field is 5.0 × 10-5 T. Find the magnitude of the EMF induced at the ends of the skipping rope.
(c) How much energy is stored in the magnetic field of an inductor of 8 mH when a steady current of 4.0 A flows in the inductor?