WJEC P2, V, I and R Facts 0.0 / 5 ? PhysicsElectricityGCSEWJEC Created by: tombreCreated on: 04-05-16 18:56 What is current? The flow of free electrons around a circuit. 1 of 14 How is current measured? Ammeter connected in series 2 of 14 What is voltage? A measure of electrical energy transferred per certain number of electrons 3 of 14 How is voltage measured? A voltmeter connected in parallel 4 of 14 What is resistance? A measure of how difficult it is for current to flow 5 of 14 What is the relationship between current and voltage with a constant temperature? Directly proportional 6 of 14 What is the current-voltage relationship when the resistance doubles and voltage stays the same? Inversely proportional 7 of 14 What is a variable resistor? A resistor that you can use to vary the resistance 8 of 14 What is electrical power? The rate per second of energy transfer 9 of 14 What is Ohm's law? Resistance = Voltage / Current 10 of 14 What happens to current in a series circuit? It is the same over the whole circuit 11 of 14 What happens to current in a parallel circuit? It splits across the components 12 of 14 In a series circuit, if bulb B1 breaks will B2 work? No 13 of 14 B1 and B2 are connected in series and B3 is connected with them in parallel. If B3 breaks will B1 and B2 break? No 14 of 14
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