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Induced Current in a Coil.
When a magnet is moved towards and inside a coil of wire,
a current is induced inside the
wire.
This can be shown by connecting the coil
to a very
sensitive ammeter called a galvanometer.
The size of the induced
current can be made bigger by
1. Using a stronger magnet.
2. Moving the magnet at a faster speed.
3. Using more turns of wire on the coil.
This would result in the pointer on
the galvanometer
moving further to the right.
The direction of the current can be reversed by
1. Moving the magnet in the
opposite direction.
2. Using a magnet facing the
opposite way round
(with North becoming South).
This would result in the pointer on
the galvanometer
moving to the left.
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Copyright © 2008 Dr. Colin France. All Rights Reserved.