1) What is the magnitude of the force on a 50 cm (0.500 m) long wire carrying 15.0 A at right angles to a 0.005 T (500 G) magnetic field?
2) A single-turn wire loop 0.050 m (5.00 cm) in radius carries 5.00 A electric current. What is the magnetic dipole moment of this loop with the current? What is the unit of magnet?
3) The magnetic dipole moment of a current-carrying loop of wire is in the positive z direction. This loop is placed in the uniform magnetic field in the positive x direction. what is the direction if the magnetic torque on the loop?