UK Mains Supply — Key Facts
Part of Mains Electricity & Safety · GCSE GCSE Physics revision
This deep dive covers UK Mains Supply — Key Facts within Mains Electricity & Safety for GCSE Physics. Revise Mains Electricity & Safety in Electricity for GCSE Physics with 18 exam-style questions and 30 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 2 of 16 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 2 of 16
Practice
18 questions
Recall
30 flashcards
📚 UK Mains Supply — Key Facts
Essential values (memorise these):
- Voltage: 230 V
- Frequency: 50 Hz (alternates 50 times per second)
- Type: AC (alternating current)
AC vs DC:
- AC (alternating current) — direction reverses constantly; used for mains power
- DC (direct current) — flows in one direction only; batteries provide DC
Why AC for mains? AC voltage can be easily changed using transformers — stepped up for efficient long-distance transmission, stepped down for safe household use.
Keep building this topic
Read this section alongside the surrounding pages in Mains Electricity & Safety. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Mains Electricity & Safety
What does AC stand for, and how does it differ from DC?
Explain how a fuse protects an electrical circuit from damage.
Quick Recall Flashcards
18 questions on Mains Electricity & Safety — practise free
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