Step-up transformer -> lower current -> less cable heating -> efficient transfer

4 questions 1 answer chain AQA Higher

step-up transformer increases the potential difference

For the same power transfer, the current in the transmission cables is reduced

Lower current causes less heating or energy/power loss in the cables

Reduced cable losses make the transfer more efficient

Ordered question set

Explain how using step-up transformers makes the network efficient.

Explain how transformer X increases the efficiency of the National Grid.

Current in the secondary coil = A

The street lamps are connected in parallel.