Electricity and magnetism

1. Electricity and Magnetism
A magnetic compass
shows the presence and
direction of the magnetic
field around a straight
length of current-carrying
wire.
The electric current
has a magnetic
field.
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3. What is an electromagnet?
When an electric current is passed through a coil
of wire wrapped around a metal core, a very
strong magnetic field is produced. This is called
an electromagnet.
Electromagnet

4. The electric effect of the magnet
Michael Faraday realized
that ...
When a magnet is
moved inside a coil
of a a wire ,an
electric current
passes through the
coil.

5. The dynamo
generator – device that changes mechanical
energy into electrical energy
an electric generator is made up of an insulated loop
of wire and a U-shaped magnet
mechanical energy for many generators is
supplied by turbines
a turbine is a large wheel that is turned by moving
steam or water