Electricity and Magnetism

by anajb

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Electricity and MagnetismMagnetismmagnetscan be natural or man-mademinerals such iron, nickel and cobalt are magnetic metaltypes of magnetspermanent magnetsnever lose their magnetisminduced magnets or temporary magnetshave a temporary magnetic forcepolesall magnets have two poles north and southif you break a magnet in half both parts will have north and south poleif you suspend a magnet in water it always points to the Earth´s magnetic north poleif you place two magnets with opposite poles together they will atract each otherif you place two magnets with the same poles together they will repel each othermagnetic fieldis the area around a magnet where it exerts its forcethe earth is a magnetthe Earth´s molten iron core acts like a huge magnetthe magnetic north pole is a slight angle away from the geographical North Pole compassis a navigational instrumentit alwais points to the northMagnets and electromagnetsmagnetic materialsmagnetic materials are alwais metalicnot all metals are attracted to magnetselectromagnetsare objects that act like magnets when an electrical current passes through themthe difference between electomagnets and permanent magnets is that electromagnets are activated by electricity