Ac Generators Flashcards
1
Q
What is an electric motor ?
A
Machine that converts electrical energy into mechanical energy
2
Q
What is an electric generator ?
A
Converts mechanical energy into electrical energy
3
Q
Alternators produce what?
A
Alternating current
4
Q
Generators produce ?
A
Direct current
5
Q
What is Lenz’s law
A
The induced EMF will oppose the motion causing it
6
Q
What hand rule do we use for generators
A
Flemings right hand rule
7
Q
What is flemings right hand rule?
A
Thumb is motion
Index finger is the field
Middle finger is the current
8
Q
The dc fed onto the slip rings is called what?
A
Excitation current
9
Q
What are the 3 configurations of excitation ?
A
Permanent magnet
Separate excitation
Self excitation
