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We can make
electricity by constructing a basic generator. This would allow
us to change kinetic
energy into electrical energy, which in turn could be stored
as chemical energy in the battery.
 The
simplest generator consists of a coil of wire and a bar magnet.
When you push the magnet through the middle of the coil, an electric
current is produced in the wire as electrons are forced along it.
This method of generating electricity is called induction.
The amount of
electricity can be increased by coiling the wire around an armature
to concentrate the magnetic field. The armature can then be turned
in such a way that many lengths of wire keep passing through the
magnetic field. The voltage can be raised by increasing the number
of 'windings' of the coil, increasing the strength of the magnetic
field or increasing the speed at which the generator turns.
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