Question

question 17 of 25
which statement describes the interaction between the permanent magnets and the electromagnet in an electric motor?
a. the current in the electromagnet is reversed by the permanent magnets.
b. the metal loop in the electromagnet turns because of the magnetic field of the permanent magnets.
c. the current in the permanent magnets is reversed by the electromagnet.
d. the poles of the permanent magnets are reversed by the electric field of the electromagnet.

Explanation:

In an electric - motor, the interaction between the permanent magnets and the electromagnet causes the metal loop (armature) in the electromagnet to turn due to the magnetic field of the permanent magnets. Permanent magnets do not reverse the current in the electromagnet. Permanent magnets do not have a current that can be reversed by an electromagnet, and the poles of permanent magnets are not reversed by the electric field of an electromagnet.

Answer:

B. The metal loop in the electromagnet turns because of the magnetic field of the permanent magnets.