Mains electricity Flashcards
1
Q
National grid
A
Connects the mains electricity (power stations) to homes through cables and pylons
2
Q
Step up transformers
A
Increases voltage and decreases current
Less current = less energy lost
3
Q
Where are step up transformers in the national grid?
A
As soon as the electricity leaves the power station
So when it travels to houses etc it has a high voltage
4
Q
What are voltage in step down transformers?
A
400,000V
5
Q
Step down transformers
A
Increases current and decreases potential difference
Less voltage = safer for home use
