Move a Magnet, Light a Bulb

You'll learnwhy moving a magnet near a coil makes electricity, and why stopping it does not.

A coil of wire, a bulb, and no battery. Push a magnet in and the bulb lights. Stop, and it goes dark. Twelve short steps; press Next for each one.

12 STEPS · 5 QUICK CHECKS · PUSH, STOP, PULL · THE BULB FOLLOWS THE CHANGE · v4

a moving magnet lights the bulb · a still magnet does not

Before you start

What you're looking at

A coil of wire with a bulb wired to it, and a bar magnet on a track. The bulb gets brighter the more voltage the coil makes.

The question

What does it take to light the bulb, with no battery anywhere?

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