Electrical resistance of a conductor causes the electric energy to be changed into heat.
An aluminum wire will become red-hot when a strong enough current flows through it.
Resistance is responsible for the heating and lighting effects of many common household appliances.
In the electric light bulb, a very thin wire (filament) of tungsten glows white-hot as current passes through it, thereby giving off light.
Heating devices such as electronic irons have resistors built in which heat up to the desired degree when a current moves through them.
Resistance is a measured in ohms, sometimes abbreviated with the Greek letter omega (..).
Ohms are named after a German scientist, Georg Simon Ohm.