Four linked simulations covering the whole electricity strand of upper-secondary Physics. Students build circuits, watch charge move, predict meter readings and test them, then work through chapter challenges and exam-style questions. Each sim has a free-build sandbox.
Written for Singapore-Cambridge O-Level Physics (6091), with Cambridge IGCSE references. Symbol view uses exam-style circuit symbols; Real view shows illustrated parts. Every file works offline, on phones and tablets, and inside SLS.
6091 topic 14 (and 15(i): thermistor and LDR) · IGCSE 4.2
Charge and current, e.m.f. and p.d., resistance and Ohm’s law, I–V characteristics of a resistor, filament lamp and diode, resistance of a wire, thermistors and LDRs.
6091 topic 15 · IGCSE 4.3
Series and parallel circuits, effective resistance, potential dividers and potentiometers, and sensing circuits with thermistors and LDRs. Includes the full component sandbox.
6091 topic 16 · IGCSE 4.2.5, 4.4
Power and the heating effect, energy and cost in kWh with the current SP Group tariff, mains wiring and hazards, fuses and circuit breakers, earthing and fault scenarios — set in a Singapore HDB flat.
6091 topics 17–19 · IGCSE 4.1, 4.5
Magnetic fields and the plotting compass, the motor effect, the d.c. motor, electromagnetic induction with a live e.m.f.–time graph, the a.c. generator and transformers.
Created by Mr Lau Chin Hang (@curiominds.inc). Hand-built canvas illustrations; no AI-generated imagery; no third-party libraries. Tariff in Practical Electricity: SP Group, 1 October – 31 December 2026 (checked 13 October 2026).