IGCSE Physics section B: Electricity 3.0 / 5 based on 1 rating ? PhysicsElectricityIGCSEEdexcel Created by: chloe pollardCreated on: 25-03-13 12:52 Name hazards that may lead to fatal electric shocks frayed cables, long cables, damage to plugs or any insulating casing, water, conductive objects. 1 of 17 Why are all mains wiring double insulated so that non of the wires are allowed to touch and also prevents anyone from touching the live wire 2 of 17 why are fuses fitted in plugs so that only a certain amount of current can pass. 3 of 17 why are circuit breakers used more often than fuses because they do not have to be replaced when they break the circuit 4 of 17 what is the power formula power= current x voltage, p=iv 5 of 17 what is the energy formula energy=power x time or energy= current x voltage x time 6 of 17 What is current it is the rate of flow of charge round the circuit 7 of 17 what is voltage it is the driving force that pushes the current round 8 of 17 what is a resistance anything in a circuit that slows the flow down 9 of 17 what happens if you increase the voltage in a circuit more current will flow 10 of 17 what happens if you increase the resistance in a circuit less current will flow 11 of 17 what does an ammeter measure current 12 of 17 what does a voltmeter measure voltage 13 of 17 where must the ammeter be placed in series 14 of 17 where must the voltmeter be placed in parallel around the component under test 15 of 17 what is the voltage formula voltage=current x resistance, v=IR 16 of 17 what is the charge formula charge=current x time, Q=It 17 of 17
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