Electrical circuits can be either
seriesor
parallel. In a series
circuit the current is the same everywhere. Think of an
electrical circuit being like a pipe containing water. What
is flowing at the start will be flowing at the end.
If one of the bulbs blows in a series
circuit, this will break the circuit (the bulb's filament
forms part of the circuit). All of the other bulbs in
the circuit will also go off.
The current in the circuit will be the same
everywhere.
As you add more bulbs to the circuit they will become dimmer
as it is harder for the cell to push the current around the
circuit. The resistance of the circuit is higher.
The voltage from the power pack is divided between the bulbs.
(The first bulb will convert some of the electrical energy
into light and heat; the second bulb in the circuit above
will convert the remaining electrical energy into light and
heat).
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