To charge up a light bulb using static electricity alone.
- A light bulb.
- A plastic comb.
Go to a dark room.
Take the comb and run it through your hair thoroughly several times.
Hold the comb to the metal contacts at the base of the light bulb.
Observe the filament of the bulb. You will see small pulses of light.
As you rub the comb through your hair, the friction between your hair and the comb cause electrons to jump from your hair to the comb, giving it a negative charge. When you touch the comb to the bulb, the electrons from the comb flow through the filament of the bulb and light it up briefly.