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20 April, 01:05

Alice builds an electric motor by positioning an electromagnet between the poles of a permanent magnet. When the electromagnet turns, the current through it switches direction because its connections to the voltage source are reversed. The repeated switching of the electromagnet's poles causes it to spin. This particular motor is used to turn the wheels of a toy car.

Which of the following actions would increase the amount of force applied to the wheels of the toy car?

A.

replacing the magnet with a stronger magnet

B.

increasing the distance between the magnet's poles and the electromagnet

C.

decreasing the number of loops in the electromagnet's coil

D.

decreasing the electric current running through the electromagnet

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Answers (1)
  1. 20 April, 01:25
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