dc and ac supply Flashcards
1
Q
where does direct current come from?
A
cells and batteries
2
Q
describe the direction of flow in a direct current?
A
only flows in one direction
3
Q
what is the uk mains supply?
A
alternating current
4
Q
describe the direction of flow in alternating current?
A
constantly changing direction
5
Q
what is a benefit of alternating current?
A
easy to use transformer to increase or decrease potential difference
6
Q
in the uk, what is the frequency of alternating current?
A
50 hertz
7
Q
in the uk, what is the potential difference of alternating current?
A
230 volts
