Tuesday, 13 January 2015

Relationship Between Voltage, Current and Resistance

Relationship between Voltage, Current and Resistance

The basic relationship between voltage, current and resistance in a circuit is known Ohm’s Law. Every material is made of from atoms, and all atoms consist of electrons, protons and neutrons. Protons, have a +ve electrical charge and Neutrons have no electrical charge while Electrons, consist of negative electrical charge.

Atoms are bound together with powerful forces of attraction present between the atoms nucleus and the electrons in its outer most shell.

When those protons, neutrons and electrons are together in the atom they are happy and comfortable. But if we separate them, they want to reform and start to exert a force of attraction called a potential difference.

Now if we create a close path circuit these loose electrons will start to move and try to attach the with the protons due to their attraction creating a flow of electrons. This flow of electrons is know as an electrical current. The electrons do not flow freely through the circuit if the material they move through creates a restriction to the electron flow. This restriction is called resistance.

Then all basic electronic circuits consist of three different but very much related quantities called: Voltage, ( v ), Current, ( i ) and Resistance, ( Ω ).