Physics: 2.3 - Currents in electrical circuits 0.0 / 5 PhysicsElectricityGCSEAQA Created by: shcooolCreated on: 26-05-15 16:48 What is an electric current? a flow of charge 1 of 12 What is the size of the current? The rate of flow of electric charge - I=Q/t 2 of 12 What is potential difference? (voltage) It is the work done (energy transferred) per coulomb of charge between 2 points in an electric circuit - V=W/Q 3 of 12 How can the resistance of a component be found? By measuring the current through, and potential difference across the component 4 of 12 The current through a resistor at a constant temperature... ... is directly proportional to the potential difference across the resistor 5 of 12 How do you calculate current? I=V/R 6 of 12 What does the current though a component depend on? its resistance 7 of 12 The greater the resistance... ... the smaller the current for a given potential difference across a component 8 of 12 The voltage provided by cells connected in series is... ... the sum of the potential difference of each cell 9 of 12 In series what is the resistance? the total resistance is the sum of the resistance of each component 10 of 12 What is the current in series? the current is the same through each component 11 of 12 What is the voltage throughout a series circuit? the total potential difference of the supply is shared between the components 12 of 12

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