The National Grid (6.2.4.3) | AQA GCSE Combined Science: Trilogy (8464) — Physics — Higher

Content	Key opportunities for skills development
$The National Grid is a system of cables and transformers linking power stations to consumers.$
$\text{potential difference across primary coil}\times\text{current in primary coil}=\text{potential difference across secondary coil}\times\text{current in secondary coil}$

Electrical power is transferred from power stations to consumers using the National Grid.

Step-up transformers are used to increase the potential difference from the power station to the transmission cables then step-down transformers are used to decrease, to a much lower value, the potential difference for domestic use.

Students should be able to explain why the National Grid system is an efficient way to transfer energy.

Higher tier only:

Students should be able to select and use the equation:

\text{potential difference across primary coil}\times\text{current in primary coil}=\text{potential difference across secondary coil}\times\text{current in secondary coil}

The National Grid

Next Steps

Learning Objectives