As motors go, this is about as simple as it gets.
A coil of wire becomes an electromagnet when current passes through it. The electromagnet interacts with a permanent magnet, causing the coil to spin. Voila! You have created an electric motor.
5 small disk or [...]
What happens when you blow a fuse?
Current flowing through a wire heats the wire. The length of a wire affects its resistance, which determines how much current flows in the wire and how hot the wire gets.
A fresh 6-volt or 12-volt lantern battery. The thin iron wire is [...]
Copper coils become electromagnetic swings.
The current generated when one copper coil swings through a magnetic field will start a second coil swinging, showing some of the ways that electricity and magnetism interact.
One 1 x 12 inch (2.5 x 30 cm) board, When you start the first coil swinging [...]
Your skin and two different metals create a battery.
When you place your hands on metal plates, you and the plates form a battery.
A DC microammeter
(15 minutes or less)
Mount both metal plates on a piece of wood or simply clamp them to a nonmetallic surface. (If [...]
When a piece of iron gets too hot, it is no longer attracted to a magnet.
A piece of iron will ordinarily be attracted to a magnet, but when you heat the iron to a high enough temperature (called the Curie point), it loses its ability to be magnetized. Heat energy [...]
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