IGCSE›Cambridge IGCSE Physics›Mind mapsSimple Phenomena of MagnetismCambridge IGCSE Physics: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsPolesUnlike poles attractLike poles repelForce is stronger when poles are closerMagnetised materials have distinct polesInduced magnetismMagnetic material becomes temporarily magnetised in a fieldInduced magnet always attracts the originalSoft iron: easy to magnetise, loses it quicklySteel: keeps magnetism, used for permanent magnetsMagnetic fieldsRegion where a pole feels a forceDirection is force on a north poleLines go north to south outside the magnetPlot with a compass or iron filingsField lines never crossMagnetismpoles and fieldsNSField strengthCloser lines mean stronger fieldStrongest at the polesLines spread out, field weakens with distanceUsesPermanent: compass needles, bar magnetsElectromagnet: motors, doorbells, relaysElectromagnets can be switched off to release loadsExam tipsSay attraction and repulsion, not push or pullForces come from interacting fields, no contact neededCompare strength using line spacing