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Electric Motors and Electromagnetic Induction

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Electric Motors and Electromagnetic Induction

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Questions and Answers

What is the main difference between an electromagnet and a permanent magnet?

The strength of an electromagnet can be changed by adjusting the amount of electricity running through it, whereas a permanent magnet's strength is constant.

What are the two main parts of an electromagnet?

The wire coil and a pair of magnets

What is the purpose of the commutator in an electric motor?

To keep the coils spinning in the same direction by reversing the electric current in the wire coil each time the coil rotates a half turn.

What is torque, and what is its effect on an electric motor?

<p>Torque is a force that causes a rotation, and it makes an axle turn in an electric motor.</p> Signup and view all the answers

Why are electric motors important in everyday life?

<p>Electric motors provide power to machines and are essential to major industrial processes and everyday activities.</p> Signup and view all the answers