Physics IGCSE – Electricity Complete Answers
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Physics IGCSE – Electricity Complete Answers 1. Insulation - Used to prevent electrical shocks when touching a wire. 2. Circuit Breakers - Break the circuit if the current exceeds a safe limit, using an electromagnet to trip a mechanism. 3. Earthing - Directs excess current safely to the ground, preventing electric shocks if a live wire becomes disconnected. 4. Double Insulation - Found in appliances like vacuum cleaners with plastic casings, eliminating the need for an earth wire ...