Electrodynamics

Question 1

What is Faradays Law of electromagnetic induction?

Answer 1

The magnitude of the induced emf across the ends of a conductor is directly proportional to the rate of change in magnetic flux linkage with the conductor.

Question 2

Parts of an AC generator (3)

Answer 2

• slip rings connected to coil
• coil of wire placed in magnetic field
• carbon brushes in contact with slip rings -connected to external circuit

Question 3

What is different between a DC generator and an AC generator?

Answer 3

A DC generator does not have slip rings but does have a commutator.

Question 4

Define commutator.

Answer 4

A metal ring that has been split into two halves. There is a gap in between the two halves.
This ensures that the direction of the current remains the same.