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Induced Current in a Generator.
The effect of inducing a current in
a coil by
moving a magnet inside it
is used for the large
scale generation of
electricity in power
stations.
There are two types of generator or dynamo.
Both turn rotational energy into electrical
energy.
1. One
type involves rotating a coil inside a magnet.
2. The
other type involves rotating a magnet
inside a coil
(like a dynamo found on a bicycle).
Both types produce alternating current.
It is possible to make a
generator without a permanent magnet.
The generator used on cars (called an
alternator)
uses an inner set of coils to make an electromagnet
which turns inside an outer set of coils.
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