Lantern battery -
DO NOT USE ANYTHING HIGHER THAN A NINE-VOLT
Small light bulb/lamp or small motor
Wire to connect battery and lamp terminal
(bare wire, not plastics or rubber covered)
Cut three pieces of wire.
Connect the wires from the battery terminals to
the lamp terminals - lamp or motor will light up
Take third piece of bare wire and drop across the
two bare wires leading between the terminals - notice
what happens. The lamp or motor should go out or
Take the third wire that was laying across the
other two wires. Take the wire clippers and cut
one of the wires leading from the battery to one
of the lamp terminals. The lamp or motor should
also go out or stop.
When the third piece of wire was dropped across the
two wires leading to and from the lamp, the wire created
a "short circuit." This doesn't mean
the electricity took a shorter course, it just took
an easier path.
When you cut the wire with the clippers, you created
an "open" circuit. If you placed a switch
on this wire... you would create the same type of
circuit you have with any electric light.