Trent builds a model electric motor. when he connects a battery to the motor, the motor spins through a half rotation and stops.

which is the most likely solution to the problem?

replacing the battery, because it is not providing current

installing new brushes, because they are not making a good connection

checking the commutator, because the current is not reversing

adding more wire coils in the armature, because the electromagnet is too weak

checking the commutator, because the current is not reversing

Explanation:

In an electric motor, reversing the direction of the current is done using a commutator. It is device made of split rigs. Brushes in the motor are the connection devices attached to the commutator. Either copper or carbon contacts are used as brushes.

Electric current in the DC motor is provided externally by connecting a battery to the commutator .

less than one you can't create energy

scientific laws are the result of testing theories and proving them to be facts.