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In an electric motor, periodically changing the direction of current in the electromagnet can cause the axle to spin because

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axle spins due to electromagnetic induction
User Karen Fisher
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3 votes

Answer:

Magnetic force

Step-by-step explanation:

An electric motor converts electric energy to mechanical energy. When a current carrying coil is placed in changing magnetic flux, a magnetic force - torque is exerted on the coil and it starts rotating.

In the given case, an alternating current flows in the electromagnet so magnetic field continuously changes direction. Axle placed between these electromagnets experiences magnetic force. The torque produces causes the axle to spin.

User Steff
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