Making
a Simple Circuit
An electrical
circuit can be made up from components such
as copper wire, batteries, switches, lamps etc.
There is one very
important rule for any circuit to work - All
the components used should produce a continuous loop
that connects to the power supply.
The loop should
contain:
-
A battery or
power source (with a known voltage
or electromotive force (e.m.f.).
-
Connecting wires
to let the energy flow from the battery to the other components.
This
flow is known as current.
-
Components in the circuit
which offer a resistance to
the current. 
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