IGCSE›Oxford AQA IGCSE Physics›Mind mapsGenerating ElectricityOxford AQA IGCSE Physics: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsGenerator effectPotential difference induced across a conductorNeeds relative movement of conductor and fieldOr a changing magnetic fieldComplete circuit means a current flowsDirectionInduced current's field opposes the magnet's motionReverse the motion, reverse the pd and currentReverse the polarity, reverse the pd and currentBigger induced pdFaster movementStronger magnetic fieldMore turns on the coilLarger coil areaGeneratorsthe generator effectacdcPower stationsTurbines turn coils between magnetsOr turn magnets within coilsAlternator vs dynamoAlternator generates alternating currentAlternator graph: sine wave that reversesDynamo generates direct currentDynamo graph stays on one side of the axisExam tipsIt is relative motion that mattersLink reversal to a reversed pd or current