How does an electric motor use magnetic force to produce motion? a. the north pole of a permanent magnet placed in the center of an electromagnet attracts the north pole of the electromagnet. b. the north pole of an electromagnet placed in the center of a permanent magnet attracts the north pole of the permanent magnet. c. the north pole of a permanent magnet placed in the center of an electromagnet repels the north pole of the electromagnet. d. the north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet.

Answer

Correct Answer is D( The north pole of an electromagnet placed in the center of a permanent magnet repels the north pole of the permanent magnet.)

Explanation:

An electric motor is a device which is used to convert electrical energy into mechanical energy. The working of electric motors is based on the interaction between magnetic field linked with motors and winding currents.This interaction generate a force which produce motion.In electric motors north pole of an electromagnet placed in the center of a permanent magnet which repels the north pole of the permanent magnet due to which motion is produced.