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Electricity and magnetism


You make a lot of use of electricity in your daily life, right? But have you ever thought about how much she would miss your life if it didn't exist?

If there is a power outage at night, we run out of electricity and everything stops: the television, the electric shower, the fan, some telephone sets, the stereo, the computer, the microwave, the elevators, etc.

Some devices operate on the power received from the electricity distribution stations; Just plug them in. But there are many other devices that work using electricity without having to plug them in directly, such as cell phones, radios, walkmans or iPODs and calculators; they receive energy from Batteries.

Another type of energy commonly used in our daily lives is magnetic energy. Thanks to magnetism, we can have records stored on cassettes and videotapes, we can use the compasses to locate ourselves, etc.

The revolution mankind experienced from the applications of electricity and magnetism intensified when scientists realized the relationship between them.

Electric charges

Electric charges are of two types: positive and negative

A subject consists of atoms. Atoms, in turn, are made up of even smaller particles: protons, neutrons and electrons.

Protons and neutrons are located in the nucleus of the atom. The electrons spin around and around the nucleus in a region called the electrosphere. Protons and electrons have a property called electric charge, which appears in nature in two types. That is why the proton was conventionally considered positive and the electron negative.