Edexcel IGCSE Physics topic guide
Electricity questions
Follow charge through circuits, connect voltage to energy transfer, and understand how electrical safety devices work.
Electricity topic overview
Electricity covers mains safety, charge, current, voltage, resistance, electrical energy and the behaviour of components in series and parallel circuits.
Mark current paths and potential differences on the circuit first, then apply the correct relationship with consistent units and explain observations using charge and energy transfer.
Question types in electricity
- Circuit diagrams and calculations using charge, current, voltage, resistance, energy and power.
- Series and parallel circuit reasoning, including component characteristics and resistance.
- Mains electricity, plugs, fuses, earthing and electrical safety explanations.
- Practical investigations using meters, variable resistors and current-voltage graphs.
Electricity subtopics
Choose a subtopic for its syllabus points, answering guidance and worked exam questions.
2.a Units
Electrical quantities, SI units and prefixes such as milli- and kilo-.
2.b Mains electricity
Appliance power, plugs, insulation, earthing, fuses and circuit breakers.
2.c Energy and voltage in circuits
Current, potential difference, resistance and energy in series and parallel circuits.
2.d Electric charge
Conductors, insulators, electron transfer and the uses and hazards of static charge.