SPM Physics: AC Generator

The different between AC & DC generator is:
-it consists of 2 slip rings instead of commutator
-slip rings allows current in outer circuit to flow in different direction

For better undertanding, watch how it moves in the video below..


The output induce current varies at different angle of the coil rotation. Observe the graph below.

• The current is zero when the coil is vertical. This is because the coil is parallel with magnetic field results in no magnetic field being cut. Thus no current is induced.

• The current is maximum when the coil is horizontal. At this point maximum rate of change or rate of cutting of the magnetic fields occur.

• You also must be able to differentiate the output graph of AC & DC generator. Click image below to see the diffrence.