Summary Topic 7 - Magnetism and Electromagnetism

The generator effect is the induction of a potential difference in a
wire which is moving relative to the magnetic field, or
experiencing a change in magnetic field

If an electric conductor is moved throuhg a magnetic field, it cuts
through magnetic field lines and a potential difference is induced
across the ends of the wire

A moving magnet in a coil of wire causes a changing magnetic
field which induces a potential difference between the ends of the
wire Basics

If there is a complete circuit, a current will flow in the wire

If you move the magnet in the opposite direction, then the pd will
be reversed, if the polarity of the magnet is reversed, the pd/
current will be aswell

If you keep the magnet moving backwards and forwards, you
produce a pd that keeps swapping direction, like ac

An induced charge generates a magnetic field that opposes the
original change

Increase the speed of movement, more magnetic field lines are
cut Increasing current
Increase the strenght of the magnetic field

Increasing the number of coils on coils on the solenoid

Converts kinetic energy into electrical

You can create ac/ dc by turning a magent end to end in a coil