dc & ac Flashcards
1
Q
types of electricity supplies
A
alternating current
direct current
2
Q
ac supplies
A
current is constantly changing direction, produced by an alternating potential difference in which the positive and negative ends keep alternating
3
Q
voltage of UK mains
A
230V
4
Q
frequency of UK mains
A
50Hz
5
Q
direct current
A
current that is always flowing in the same direction, created by a direct potential difference
6
Q
what type of supply is mains?
A
ac
7
Q
what type of supply is in cells and batteries?
A
dc
