Electromagnet and solenoid in 3D

Change the current and the number of turns, add or remove the iron core, and reverse the current.

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Questions students ask

How can you make an electromagnet stronger?

Increase the current, add more turns, or use a soft iron core.

Why is the core made of soft iron?

It magnetises and demagnetises easily, so the magnet switches off when the current stops.

Free notes on electromagnetism

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