Spec 0625
Revise CIE IGCSE Physics 4.4.2 Fuses, trip switches and earthing with the question bank and revision guides.
Explain the use and operation of trip switches and fuses and choose appropriate fuse ratings and trip switch settings • Explain why the outer casing of an electrical appliance must be either non-conducting (double-insulated) or earthed • State that a fuse without an earth wire protects the circuit and the cabling for a double-insulated appliance
