the national grid Flashcards
1
Q
what does the national grid consist of?
A
a system of transformers and high voltage cables
2
Q
what does it connect?
A
the power stations to the homes
3
Q
what happens to energy?
A
energy is always lost in the power cables due to the resistance of the wires
4
Q
how do we reduce energy loss?
A
by building power stations near to homes
5
Q
where does electricity pass through?
A
step up transformers which increase the potential difference to several hundred thousand volts
6
Q
what happens when the potential difference is very high?
A
less energy is lost in the power cables
7
Q
where does electricity pass through last?
A
step down transformers which reduce the potential difference to around 230V
