resistance 2.0 / 5 based on 1 rating ? PhysicsElectricityGCSEAQA Created by: LeahCreated on: 05-02-13 19:18 what is the unit of resistance? Ohms 1 of 9 what is the unit of potential difference? pd volts 2 of 9 what is the unit of work done? Joules 3 of 9 what is the unit of charge? coulombs 4 of 9 how do you work out the potential difference across a component (in volts)? work done or energy transferred (in joules) / charge ( in coulombs) 5 of 9 how do you work out resistance? potential difference/current 6 of 9 what does Ohms law say? that the current through a resistor at constant temperature is directly proportional to the potential difference across the resistor 7 of 9 what does reversing the current through a component do? reverses the pd across it 8 of 9 if the current through a resistor is decreased what happens to the pd across the resistor? increases 9 of 9
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