A.C Generators - Just Turn the Coil and There’s a Current Flashcards
1
Q
1) What do generators do first?
A
Rotate a coil in a magnetic field
2
Q
2) What is their construction like?
A
Pretty much like a motor
3
Q
3) What happens as the coil spins?
A
A current is induced in the coil
4
Q
3) How often does this current change direction?
A
Every half turn
5
Q
4) What do a.c generators have instead of a split-ring commutator?
A
Slip rings and brushes so the contacts don’t swap every half turn
6
Q
5) What does this mean they produce?
A
A.c voltage, as shown by these CRO displays
7
Q
5) What do faster revolutions produce?
A
Not only more peaks but higher overall voltage too
8
Q
6) What do power stations use a.c generators to produce?
A
Electricity - they just get the energy needed to turn the coil or magnetic field in different ways
9
Q
Look at diagram page 63
A
Ok
