Domestic uses and mains supply, Flashcards
What is the role of the live (brown) wire?
It carries potential difference from the mains supply
What is the role of the neutral (blue) wire?
Complete the circuit
What is the role of the Earth (green and yellow stripy) wire?
It only carries current if there is a fault
What is earthing?
It’s a safety device that involves the Earth wire joining to the metal case so that the current does not pass through the person
What is the potential difference between the live and earth wire?
230 V
What is the potential difference of the neutral and earth wires?
0V
What is the frequency amount and voltage amount in the mains supply?
50Hz
230V
What is an alternating current?
The potential difference switches direction many times a second, current switches direction.
Where does an alternating current take place in?
A generator
What is a direct current?
Potential difference remains in one direction, current flows the same direction
Where does direct current take place in?
A cell or battery
