GCSE›Edexcel GCSE Physics›Mind mapsElectromagnetism & The Motor EffectEdexcel GCSE Physics: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsField round a wireCurrent makes concentric circles of fieldReverse the current → field reversesBigger current → stronger fieldFurther away → weaker fieldSolenoidA coil of wire carrying currentTurns' fields add inside: strong, near-uniformFields cancel more outside: weakField looks like a bar magnetMotor effectConductor in a field feels a forceEqual and opposite force on the magnetFleming's left-hand rule: thumb = thrustFirst finger = field, second = currentMotor effectcurrent and fieldsBIFForce sizeF=BIlF = BIlF=BIlB in tesla, I in amps, l in metresOnly when current is perpendicular to field0.2 T, 3 A, 0.5 m → 0.3 NElectric motorCoil in a field, current in opposite directionsOpposite forces give a turning effectCoil rotates continuouslyExam tipsMotor effect uses the left hand, not rightForce and rule questions are Higher tier