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Lesson 33 AC Generators.

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Presentation transcript:

Remember?

Electromagnetic induction Can you carefully wind your wire around the cardboard tube?

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Electromagnetic induction If a magnet is moved inside a coil an electric current is induced (produced) STICK IN please!

Electromagnetic induction An electric current is induced because the magnetic field around the coil is changing (the coil ‘cuts through’ the lines of field). COPY this please!

Gather round

http://phet.colorado.edu/sims/faraday/generator_en.jnlp

Can you stick this in please? Generator/dynamo A generator works by rotating a coil in a magnetic field (or rotating a magnet in a coil). A slip-ring commutator produces alternating current (a.c.)

Can you stick this in please? Generator/dynamo A generator works by rotating a coil in a magnetic field (or rotating a magnet in a coil). A slip-ring commutator produces alternating current (a.c.)

Stand up!

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Bicycle dynamo