Magnetic Fields A magnetic field consists of imaginary lines of flux moving around a magnet where the magnetic force is exerted Magnetic field lines always

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  • Magnetic FieldsA magnetic field consists of imaginary lines of flux moving around a magnet where the magnetic force is exertedMagnetic field lines always form loops.

    The lines represent the invisible magnetic field surrounding a magnet

  • Some important facts emerge when plotting lines of force:Lines of forceNEVERcross.Lines of force areCONTINUOUS.Lines of force always form individualCLOSED LOOPSaround the magnet.Lines of force have a definiteDIRECTIONfrom North to South.Lines of force that are close together indicate aSTRONGmagnetic field.Lines of force that are farther apart indicate aWEAKmagnetic field.

  • The Earth itself is a magnet, with a magnetic northpole and south pole.SNThe Earths magnetic field continually traps moving charged particles coming from the sun, called solar wind.The origin of the Earths magnetic field is said to be a result of the electric currents produced by the rotation of the iron-nickel core.

  • What is a Magnet?A magnet is anything that attracts materials that has a magnetic field and will attract materials like iron, nickel and cobalt.

    A material that has strong magnetic properties is called ferromagnetic (ferrum is a latin word for iron.)

  • Uses for MagnetsHolding things on your refrigerator!Credit cardsComputersElectronicsCompassesAnd many more!

  • Properties of MagnetsMagnets attract when the OPPOSITE POLES of two magnetic objects are close to each other.

    Magnets also strongly attract ferromagnetic materials such as iron, nickel and cobalt.

  • Magnets Repel when LIKE POLES are facing each other, the magnetic force pushes them apart

    Part of a free swinging magnet always points in the direction of north (like in a compass!)

  • Magnetic PolesWe call the ends of magnets polesALL magnets have a north (N) pole and a south (S) pole. Like poles repelOpposite poles attract

  • Magnetic Poles

  • How it looks throughout the object

  • ElectronsElectrons are tiny negative particles that surround an atom and are what give magnets their magnetic properties

    Spinning electrons produce a magnetic field

    When many electrons are spinning in the same directions those individual magnetic fields combine to form a stronger magnet

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