When a wire is moved through a magnetic field.
Potential difference is induced at the ends of the wires.
You can increase the voltage output by:
- Increasing the area of the coils
- Increasing the number of coils
- Increasing the magnets strength
- Increase the speed of movement
If you use a stronger magnet:
- The wire kicks forward
If the magnet is reversed:
- The wire moves the other way
When a current is passed along a wire in a magnetic field, it may experience a force. This force, believe it or not, is called the Motor Effect. Fun, no?
The size of the force can be increased by:
- Increasing the strength of magnetic field
- Increasing the size of the current
The direction of the force on the wire can be reversed if either the magnetic field or current are REVERSED or DESREVER
Direct current does not induce ALTERNATING MAGNETIC FIELDS so a seconday voltage won't be produced.
AC is used in transformers
ALTERNATING CURRENT is used
AC CURRENT !!!!