What is Electricity?
Electricity is a flow
of charged particles.
Charged particles can be electrons or ions.
(If you are not sure what electrons or ions are,
see GCSE Chemistry at electrons or ions).
In chemistry, ions which
are free to move will conduct electricity
In physics, we are dealing with electricity as a flow of electrons.
A cell uses chemical reactions to make electricity.
In the circuit below, electricity will flow
from the cell (or battery),
through the lamp (light bulb) and back to the cell.
There is a difference between a cell and a battery.
In every-day life, we use the word "battery".
In physics, one "battery" on its own is called a cell.
Two or more cells that are joined together are called a battery.
The word "battery" is used to mean "collection".
A collection of cells is called a battery of cells.
The cells of a battery
are joined together
The positive side of one cell touches the negative side of the next cell.
See also what happens to the voltage if cells
are in parallel.
What happens to the current if cells are in parallel or in series.
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