How can the strength of an electromagnet be controlled?

By changing the number of coils of wire or adjusting the amount of electricity flowing through the wire.

What is the purpose of looping a wire carrying a current around and around many times?

To concentrate the magnetic field.

Iron is a magnetic core that strengthens the magnetic field when the wire is looped around it.

Name: Electromagnets: How They Work
Author: Insta~Lesson

8th Grade · Science · 40 min· Ngss Ms-ps2-3

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