Answers CSD Summer 2026 PhysicalEarth Science Lab: Magnetic and Electric Fields — Unit testQuestion 14

14

QuizMultiple Choice

Lab: Magnetic and Electric Fields — Unit test

Question 14 • CSD Summer 2026 Physical/Earth Science

Which best compares a brush and a commutator in an electric motor?

Answer

A

Both rotate when the motor is on.

B

Both carry electrical current from a power source.

C

Both remain stationary when the motor is on.

D

Both have a permanent magnetic field.

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