In a UK-style 3-pin plug, the colour of the LIVE wire is:
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Practise IGCSE 0625 questions in the style of recent Extended past papers, organised by syllabus subtopic. Each set comes with an examiner-style mark scheme and a downloadable worksheet.
Everything students ask about Cambridge IGCSE 0625 Electrical safety Topical Past Papers.
Top questions students ask on this sub-topic
These Electrical safety Topical Past Paper Questions are written in the style of recent Cambridge IGCSE Physics 0625 Extended papers and grouped by the Electricity and magnetism (P4.4) section of the 2025–2027 syllabus. Use them to revise the exact skills examiners test in this part of the course.
Each question is graded Easy → Medium → Hard, plus an A★ Challenge for top-grade preparation. Tap a question to mark your own answer, then unlock the examiner-style mark scheme with model solutions and examiner tips. A printable Topical Past Papers worksheet is included so you can practise offline.
Identify dangers in mains circuits (frayed cables, long cables, damaged plugs, water near sockets). Describe the function of fuses, circuit breakers, switches in live wires, and earthing for metal-cased appliances.
In a UK-style 3-pin plug, the colour of the LIVE wire is:
A fuse should always be fitted in:
List FOUR specific dangers that can occur in domestic mains circuits.
Give four hazards (one mark for any two correct).
[2 marks]A kettle is labelled 230 V, 2300 W. Fuses available are 3 A, 5 A, and 13 A.
Calculate the normal operating current of the kettle.
[1 mark]State which fuse should be fitted and explain why.
[2 marks]The purpose of EARTHING a metal-cased appliance is to:
A toaster is labelled 230 V, 1150 W. Its metal casing is connected to the earth wire via a 3-pin plug.
Calculate the normal operating current of the toaster.
[1 mark]A loose live wire inside the toaster touches the metal case. Describe step-by-step what happens, including the role of the EARTH wire and the FUSE.
[2 marks]Compare a FUSE and a CIRCUIT BREAKER as protective devices in domestic wiring.
State how each device responds to an excessive current.
[2 marks]Give TWO advantages of a circuit breaker over a fuse.
[2 marks]A double-insulated hairdryer rated 230 V, 920 W is supplied with a two-core flex (no earth wire). Which statement is correct?