National Grid

Question 1

What are the 4 parts of the getting electricity into our homes?

Answer 1

1) Power stations
2) step up transformer
3) pylons
4) step down transformer

Question 2

What does a step up transformer do?

Answer 2

Increase the voltage and decreases the current

Question 3

What does the step down transformer do?

Answer 3

Increase the current and decrease the voltage

Question 4

Why does the step down transformer have to decrease the voltage?

Answer 4

For saftey

Question 5

Why does the step up transformer increase the voltage?

Answer 5

Because sometimes energy is wasted through the different points so they need to make sure they have enough for the homes by the time the electricity reaches them.

Question 6

Name a benefit for underground cables?

Answer 6

Hidden

Question 7

Name 3 disadvantages for underground cables?

Answer 7

1) expensive to lay
2) expensive to repair
3) casing to prevent heat

Question 8

Name a disadvantage of overhead cabling.

Answer 8

spoil the landscape.