ElectricityHigh Exam FrequencyAQA

Mains Electricity & Safety

Revise Mains Electricity & Safety in Electricity for GCSE Physics with 13 exam-style questions and 30 flashcards. This is a high-frequency exam topic, so students should expect to explain it clearly under timed conditions.

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Why the Earth Wire Saves Lives

Introduction 2

UK Mains Supply — Key Facts

Deep Dive 3

Three-Pin Plug Wiring

Diagram 4

The Three Wires — What They Do

Deep Dive 5

Safety Devices — How They Protect You

Deep Dive 6

Double Insulation

Deep Dive 7

Choosing the Right Fuse

Deep Dive 8

How It Works: Why AC Peaks at 325 V But We Say 230 V

How It Works 9

Key Definitions

Definitions 10

Key Facts Summary

Key Facts 11

Fuse vs Circuit Breaker

Comparison 12

Common Misconceptions

Misconceptions 13

Memory Aid

Memory Aid 14

Higher Tier Only: RMS Voltage and AC Waveforms

Higher Tier 15

Exam Focus

Exam Focus 16

Exam Tips for Mains Electricity and Safety

Exam Tips 17

Topic Summary: Mains Electricity and Safety

Summary

Sample Flashcards

What is AC?

Alternating Current — current direction reverses constantly (50 times/second in UK)

What is DC?

Direct Current — current flows in one direction only (batteries provide DC)

Sample Questions

What does AC stand for, and how does it differ from DC?

A. Alternating current; it flows at a higher voltage than DC
B. Alternating current; it repeatedly changes direction, whereas DC flows in one direction only
C. Adapted current; it is produced only by batteries
D. Alternating current; it flows at a constant rate, whereas DC changes direction

1 markfoundation

Explain how a fuse protects an electrical circuit from damage.

2 marksstandard

exam-style questions

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