phsyic p2 0.0 / 5 ? PhysicsElectricityGCSEAQA Created by: Ronel.pCreated on: 09-01-18 00:45 Cell pushes current around a circuit 1 of 29 circuit cell, wire, bulb 2 of 29 current flow of charge 3 of 29 charge and current equation q=it 4 of 29 current, resistance and potential difference equation v=ir 5 of 29 what are i and r in a circuit is inversely proportional 6 of 29 resistor anything which can reduce the flow of current in a circuit 7 of 29 i and r are what directly proportional to each other/ linear realationship 8 of 29 ohms law the current through a componet is proportional to the pd across it(if temperature remains constant) 9 of 29 does a filament lamp obey ohms law no 10 of 29 section 1 in graph of a filament lamp low resistance/ low temperature 11 of 29 section 2 of a filament lamp high resistance - temperature high 12 of 29 thermistor resitors resistance decreases as temperature decreases 13 of 29 how are ammeters connected to a circuit in series 14 of 29 how are voltmeter connected to a circuit in a parralel 15 of 29 current in a Series Current is same everywhere 16 of 29 Current in a parallel Total current equal to sum of currents through each branch 17 of 29 potential difference in a series circuit Total p.d. of power supply shared between components 18 of 29 potential difference in a parallel circuit P.d. across each branch is equal 19 of 29 resistance in a series circuit Total resistance is sum of resistances of each component 20 of 29 resistance in a parallel circuit Total resistance is less than resistance of each resistor 21 of 29 Neutral completes circuit (at or close to 0 V)(blue) 22 of 29 Earth – carries current if there is a fault(yellow green) 23 of 29 live provides alternating potential (voltage) from power supply(brown) 24 of 29 dc( direct currents battery 25 of 29 alternating currents switch 26 of 29 energy transfer in electrical circuits e=qv 27 of 29 Step-UP transformers INCREASE voltage 28 of 29 Step-DOWN transformers DECREASE voltage 29 of 29
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