Electric Generator
Electric Generator is a machine that turns spinning motion into electric power using magnets and wire coils.
A hand-crank egg beater has a handle, gears, and spinning blades. When you turn the handle, the gears spin the blades around inside the bowl. An electric generator works the same way. Magnets spin inside coils of wire, and that motion pushes electric current through the wire.
Explaining electric generator by grade level
Spin a magnet near a coil of wire. The magnet pushes on tiny bits inside the wire. Those bits start to move and flow. That flow is what we call electricity.
Projects that explore electric generator
Spinning magnets inside a coil of wire can push charges through metal — and that push is voltage. In this experiment, you wind thin wire around a small cardboard box, then mount four ceramic magnets on a nail inside it. When you spin the nail fast with a hand-crank drill, the changing magnetic field forces charges through the wire and into a tiny bulb. The filament glows as charges speed up through its narrow wire and produce heat.
A generator's output depends on how many turns of wire wrap around its coil. You wind insulated wire around three identical boxes at 150, 300, and 450 turns, then spin magnets inside each using an electric screwdriver. As the magnets spin, their changing magnetic field creates a current in the wire. A digital voltmeter shows the result: the more turns the coil has, the higher the voltage reading. Each additional loop captures more of that changing field, converting more spinning motion into electric power.