National grid/energy generating methods

Question 1

What is a transformer?

Answer 1

An electrical devices that changes the voltage of an alternating current supply, such as the mains electrical supply.

Question 2

Describe the main features of the national grid?

Answer 2

1) step-up transformers
2) high voltage transmission lines
3) step-down transformers
4) consumers, for example homes, factories and shops

Question 3

what is the National Grid and what is it made up of?

Answer 3

Electricity is distributed from power stations to consumers along the National Grid. The NG is made up of;

• power station
• step-up transformer
• grid system
• step-down transformer
• homes