The National Grid — AQA GCSE Combined Science: Synergy 8465
AQA GCSE Combined Science: Synergy · 8465
The National Grid
What you need to know
Recall that the National Grid is a system of cables and transformers linking power stations to consumers.
Explain how electrical power is transferred from power stations to consumers at high voltages and then distributed at lower voltages for domestic use.
Explain why transferring electrical power at high voltages is an efficient way to transfer energy.
Describe the roles of step-up transformers (to increase potential difference for transmission) and step-down transformers (to decrease potential difference for domestic use).
Select and use the given equation relating potential differences and currents in the primary and secondary coils of a transformer (Higher Tier only).
