Electricity And The National Grid

Question 1

What is the national grid

Answer 1

The network of pylons and cables that covers the whole of Britain, getting electricity to homes everywhere

Question 2

What does the national grid do?

Answer 2

• Takes electrical energy from power stations to where it’s needed

Question 3

To transmit the huge amount of power needed you need….

Answer 3

Either high voltage or a high current

Question 4

What’s the problem with a high current

Answer 4

You lose loads of energy through heat in the cables

Question 5

What do the transformers have to do

Answer 5

• Step up the voltage at one end for efficient transmission

- Bring it back down to safe, usable levels at the other end

Question 6

The voltage is increased using a

Answer 6

Step up transformer