Alternating current

12.2.1:  Describe the emf induced in a coil rotating within a uniform magnetif field:

If the coil is rotating with a constant speed, the emf generated is sinusoidal and affected by four factors:

• The number of turns of coil.
• The angle of flux cutting (90 degrees).
• The speed of flux cutting.
• The magnetic field strength.

12.2.2 Explain the operation of the basic alternating current (ac) generator

Many turns of coils of wire are wound around an object which then can be rotate in a magnetic field. The axle is rotated and an induced emf is formed, creating a current