11
practice examMultiple Choice

Practice Exam

Question 11 • Physics

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?

Answer
A
replacing the battery, because it is not providing current
B
checking the commutator, because the current is not reversing
C
adding more wire coils in the armature, because the electromagnet is too weak
D
installing new brushes, because they are not making a good connection
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Trent builds a model electric motor. When he…