Electricity (Year 9) Flashcards
1
Q
what colour is the live wire?
A
brown
2
Q
what colour is the neutral wire?
A
blue
3
Q
what colour is the earth wire?
A
green and yellow
4
Q
what is the voltage mains electricity is supplied at in the UK?
A
230V
5
Q
what is the frequency of mains electricity in the UK?
A
50Hz
6
Q
which direction does current flow in? (unless it says ‘conventional current’)
A
negative to positive
7
Q
which direction does conventional current flow in?
A
positive to negative
8
Q
what is AC current?
A
current the constantly changes the direction it’s flowing in
9
Q
what is DC current?
A
current that constantly flows in the same direction
