AS AQA Phys Unit 1 Current/P.D. Definitions 3.0 / 5 based on 1 rating ? PhysicsD.C. ElectricityASAQA Created by: Jessica ParkesCreated on: 29-03-13 10:43 Current, I (A) Current is the rate of flow of charge measured in amperes. 1 of 5 Coulomb (C) The amount of charge that passes in one second when the current is one ampere. 2 of 5 Potential difference (voltage) The energy converted per unit charge moved. 1 volt is equal to 1 joule of energy moving 1 coulomb of charge through a component. 3 of 5 Ohms law Provided temperature is constant, the current through an ohmic conductor is directly proportional to the potential difference across it. 4 of 5 Efficiency Work done = efficiency (as decimal) * electrical energy input or Electrical energy input = work done / efficiency 5 of 5
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