Electricy At Home Flashcards
(7 cards)
1
Q
What is alternating current
A
Current that constantly changes direction
2
Q
What is the potential difference and frequency of mains electricity
A
230V 50Hz
3
Q
What is the equation for energy transferred
A
Power x time
4
Q
What does the live wire do
A
Carries current to device
5
Q
What does the neutral wire do
A
Carries current out of the device
6
Q
What does the earth wire do
A
Provide an alternative path if the live wire cannot
7
Q
What is the national grid
A
A system of cables that links power stations to the consumers
