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Mini-Quiz: Electromagnets

by Ron Kurtus (updated 12 February 2022)

Take this Mini-Quiz to check your understanding of the lesson material.

1. Why should the wire around the iron core be insulated?

So that you don't create a short circuit

To keep the rod from getting too warm

To insulate the magnetism

2. Why does an iron core increase the magnetic field of a coil of wire?

The iron atoms line up to add to the magnetic field

Iron attracts things, including magnetic fields

The iron core actually decreases the field, allowing it to be turned off

3. Which of the following devices does NOT use electromagnets?

Electric automobile

Electric incandescent light bulb

Electric door lock

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

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Mini-Quiz: Electromagnets

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