You will need
- battery, wire, screw, magnet
Take a piece of wire, strip both ends. Slightly bend it and set briefly aside.
Take the screw and place it on magnet hat down (it should stick flat side). The magnet Assembly of the electric motor can be removed from the old headphones little, "bumps" or remove the compact version of the fridge magnet. A screw with a magnet to the edge of the battery. The screw is magnetized and will stick with the edge. The rotor of the motor ready.
A finger of one hand squeeze one of the ends of the wires to the opposite screws from the edge of the battery. The second end near to the other edge, the cap screw with a magnet. By contact of the screw begin to come into motion.
Considering the small force of friction (screw for the battery at one point), the screw can be unwound to 10 thousand revolutions per minute. Therefore, when you repeat the experiment, keep the device away from face – a rotor can easily fly off with great speed. Take care of your eyes.