IGCSE Physics: Mains Electricity and Plugs | Edexcel Modular | Unit 2 | L11

IGCSE Physics: Mains Electricity and Plugs | Edexcel Modular | Unit 2 | L11

This lesson covers spec point 2.2 — knowing the structure of a 3-pin plug
including wire colours and roles, and describing insulation, double insulation
and earthing as safety measures.

PowerPoint includes:
• Retrieval starter reviewing AC/DC and mains supply from L10
• Direct Instruction (I Do) — plug structure described; live (brown), neutral
(blue) and earth (green/yellow) wires identified with roles; fuse in the
live wire explained; earth wire protection mechanism modelled step by step;
insulation and double insulation explained; plastic-cased appliances
discussed
• Guided Practice (We Do) — three tasks: name the wire colours and roles;
explain the role of the earth wire; explain why a plastic-cased drill
doesn’t need an earth wire
• Independent Practice (You Do) — wire colour and role identification; earth
wire and fuse protection explanations; double insulation questions
• Review and Reflect — 3 MCQs and exit ticket

Activity Sheet includes:
• Wire table (colour, voltage, role) for students to complete — scaled to fit
within the question box
• 10 exam-style questions covering plug wiring, the earth/fuse protection
sequence, insulation, double insulation and domestic hazards
• Stretch question: swapped live and neutral wires — will the lamp work? why
is it still dangerous? why does the fuse offer less protection?
• Full mark scheme for teacher use