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What is electricity
Electricity is the flow of electric charge.
Atoms
Atoms are build up of Protons, Neutrons and Electron.
Electrons can escape the atom and bind to a new Atom.
Copper is used in wires because it has 29 Electrons, with one in the outer (Valence) Shell. This Atom can easily escape and switch places.
Normally an atom has the same amount of protons and electrons, when this is not the case the atoms has a charge.
Voltage
is like the pressure in Cable, it forces the Electrons to move.
Current
A cable with a lot of electrons flowing through it has a high current. A cable can only handle a specific type of current. When the current is to high, the cable breaks
Circuit
A electric circuit is a closed loop through which electrons flow.
Normally in a copper wire the atoms randomly exchange electrons.
When there is a force applied to some side, the electrons move in a specific way
Voltage is how much these electrons want to move
Resistance is how hard it is for them to move
Current is how many electrons are moving in a specified time
Ohms Law
Voltage = Current * Resistance Resistance = Voltage / Current Current = Voltage / Resistance