Electrical Engineering & Safety

8 interactive Design & Technology simulations on electrical engineering & safety.

Design & Technology · Electrical Engineering & Safety Electrical safety – shock current, earthing and RCD breakers Four common household electrical accidents: touching a bare live wire, holding a metal-cased appliance with a leakage fault, repairing... Ages 13–14
Design & Technology · Electrical Engineering & Safety Household electrical appliances – energy consumption and tiered electricity bills The house has nine familiar electrical appliances with realistic power ratings: a 9 W LED bulb, a 60 W fan, a 100 W TV, a fridge, a 700... Ages 11–12
Design & Technology · Electrical Engineering & Safety Staircase lighting circuit – schematic and installation diagrams A staircase lighting circuit uses two two-way switches to control one lamp from two locations, with an optional intermediate switch... Ages 14–15
Design & Technology · Electrical Engineering & Safety Household electrical circuit – fuse, switch, socket and overload A diagram of a 220 V household circuit: supply → protective device (fuse or circuit breaker) → parallel branches of switch–lamp pairs... Ages 13–14
Design & Technology · Electrical Engineering & Safety AC circuits – phase difference and power factor (cos φ) An AC source u = U√2·sin(ωt) supplies a purely resistive load, an R–L load (motor, ballast), an R–C load, or a series R–L–C load.... Ages 17–18
Design & Technology · Electrical Engineering & Safety Saving electricity – LED lamps, air conditioning and tiered billing A house has a bank of lights and an air conditioner: choose incandescent, compact fluorescent or LED lamps for the same 800 lm output,... Ages 17–18
Design & Technology · Electrical Engineering & Safety Power transmission – transformers and losses ΔP = P²R/U² Electricity travels from the power plant through a step-up transformer, a high-voltage line and a step-down transformer to reach... Ages 17–18
Design & Technology · Electrical Engineering & Safety Home electrical panel – main breaker, branch circuits and shock protection The home's electrical panel has a main circuit breaker, a residual-current circuit breaker (RCCB, 30 mA) and branch breakers feeding... Ages 17–18