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The Basics
Electricity is essential not only to life but to every element we know of. It is one of the build blocks of atoms, and that is the best place to start to understand electricity.
In case you don?t know it atom are the building blocks of matter. The consist of electron proton and neutron and as far as we know they all appear in this shape.
The nucleus (the centre bit) is made of neutron and protons. neutron have no electrical charge; proton have a positive electrical charge. Surrounding the nucleus are electron which move in orbital paths around it. Each different element has differing amounts of proton and neutrons. For example copper has 29 electrons, 35 neutron and 29 protons.
A normal atom has an equal number of electron and proton and the negative and positive charge cancel each other out and the atom is balanced i.e. it has no net electrical charge. However it is possible for atom to lose or gain an electron, changing the balance. If it loses an electron it has more positive (protons) than negative (electrons) so there is a net positive charge and is called a positive ion and if it gain one it has a net negative charge and is called a negative ion.
Ok so atom can lose and gain electrons. With this comes the fact that now and again electron must be between atom and can exist on their own. electron that are not moving are said to be at rest and the surface they are resting upon is said have a negative static (or still ? that?s where the name comes from) charge.
Electrons can also move. A stream of moving electron is called an electrical current. When still electron find a path to a positively charged ion then they will rush to them to correct the imbalance.
Atoms can become positively charged from a number of means. An electron might be knocked loose by a physical force or by light, heat or via a chemical process. When this happens the material is said to have a positive static electrical charge.
We can take advantage of these imbalances which nature want to correct by making the electron do some work on their way past.
The Basics | | | Author | Message | | clementmambwe
6 | how can i get the free basic knowledge about troubleshooting and part identification of semiconductors such as audio power transistors,diodes,resistors, capacitors etc? | Anonymous
172 | There is no "hard" law about this. In Atoms with less then about 17 protons there is one neutron per proton. Above this the number of neutrons increases more and more faster than the number of protons. This is due to the low-range core forces decreasing (dont exactly know the english tern, since I am german) in proportion to the longer range electric force increas.
You can think of neutrons "glueing" the core together and the bigger the core, the more glue is needed.
mfg
Esko | Anonymous
172 | Is there a relationship between the number of protons and neurtons? | |
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