5.EFFECTS OF ELECTRIC CURRENT

5.1 Heat

The energy that an electric current produces as heat is called the Joule Effect. It is expressed by the following formula:  E= I2 x R v t

5.1 Light

There are various ways that electricity can be used to produce ligth.

Incandescent bulbs: When an electric current passes through the metalic filament of a ligth bulb, it produces ligth.

Fluorescent tubes. Inside fluorescent tubes, there is a metallic, normaly made of tungsten.
There is also an inert gas, such as argon, and a small amount of mercury. When an electric current passes through the filament, electrons are emited into inert gas.
Unfortunated, flourescent tubes contain a numbers of toxic substances, such as phosphor and mercury.