Question

4.2.2 quiz: electromagnetism
question 10 of 10
what part of a motor causes its electromagnet to turn in the same direction consistently, transforming electrical energy into mechanical energy?
a. battery
b. permanent magnets
c. commutator
d. loop of wire

Explanation:

A commutator in a motor reverses the current direction in the electromagnet (loop of wire) at regular intervals. This ensures that the force on the electromagnet (due to the interaction with permanent magnets) always acts in the same rotational direction. A battery provides electrical energy, permanent magnets provide a magnetic field, and a loop of wire is part of the electromagnet but doesn't by itself ensure consistent one - direction rotation.

Answer:

C. Commutator