AQA GCSE Physics · 8463
Specification 4.2.4.3, 4.7.3.4 · Paper 1, Paper 2
A device that decreases the potential difference of an alternating supply.
Revise: The National GridNear consumers, step-down transformers decrease the potential difference to a much lower value suitable for distribution and domestic use. Thus, the Grid uses a high potential difference for efficient long-distance transmission but does not supply consumers directly at that transmission potential difference.
- Revise: Transformers