National Grid Flashcards
What are the pros of having underground of powerstations?
- not affected by weather
- doesn’t make an area look ugly
What are the cons of having underground powerstations?
- affects nature
- expensive to dig up if any needs to be repaired
The pros of overhead powerstations
- easier to repair
- cheaper
The cons of overhead powerstations
- Weather can affect it e.g. lightning
- takes up valuable space
What is the national grid?
A network of pylons and cables that connects powerstations to our homes.
Name the stages of how you get electricity to your house from a PS
Powerstation ➡️step up transformer ➡️pylons ➡️step down transformer ➡️houses
What does the step up transformer do?
- increases voltage
- decrease current
- less heat is lost
What does the step down transformer do?
- decrease voltage
how many volts go through the pylons?
400,000V
how many volts does the Ps to Step up have?
25,000V
how many volts does the step down t have?
23V
What effect does the wasted energy have on the surrounding area?
Makes the air hotter.
what will making the current in the cables smaller do?
It will reduce the energy lost in the cables.
