* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Magnetism
Skin effect wikipedia , lookup
Magnetosphere of Jupiter wikipedia , lookup
Maxwell's equations wikipedia , lookup
Magnetosphere of Saturn wikipedia , lookup
Geomagnetic storm wikipedia , lookup
Magnetic stripe card wikipedia , lookup
Edward Sabine wikipedia , lookup
Neutron magnetic moment wikipedia , lookup
Friction-plate electromagnetic couplings wikipedia , lookup
Lorentz force wikipedia , lookup
Mathematical descriptions of the electromagnetic field wikipedia , lookup
Giant magnetoresistance wikipedia , lookup
Electromagnetism wikipedia , lookup
Magnetic monopole wikipedia , lookup
Magnetometer wikipedia , lookup
History of electrochemistry wikipedia , lookup
Magnetotactic bacteria wikipedia , lookup
Electric machine wikipedia , lookup
Magnetic field wikipedia , lookup
Electromagnetic field wikipedia , lookup
Earth's magnetic field wikipedia , lookup
Magnetochemistry wikipedia , lookup
Multiferroics wikipedia , lookup
Magnetohydrodynamics wikipedia , lookup
Magnetoreception wikipedia , lookup
Magnetotellurics wikipedia , lookup
Electromagnet wikipedia , lookup
Eddy current wikipedia , lookup
Ferromagnetism wikipedia , lookup
Force between magnets wikipedia , lookup
Magnetism Natural Magnets Natural magnets like lodestone, are found in nature Artificial Magnets Artificial or man made magnets are made by magnetising: »Iron »Nickel »Cobalt »Alloys of the above The Poles Magnets are strongest at their 2 ends called the “north pole” and the “south pole”. Like Poles Repel and Unlike Poles Attract. Unike Poles Attract Like Poles Repel How to Test if Something is a Magnet? The true test for determining if something is a magnet is repulsion. A Designer Floating Bed The Earth’s Magnetic Field The Earth behaves as if there is a huge bar magnet in its centre giving it a magnetic field. What is a Magnetic Field? A magnetic field is the space around a magnet over which it has a magnetic effect. How a Compass works? A freely suspended magnet always comes to rest with one end pointing I a northerly direction. A Compass A compass contains a freely suspended magnet which reacts to the magnetic field of the Earth. Electricity and Magnetism Electricity can make a magnet and a magnet can be used to create electricity. A wire with a current flowing through it has a magnetic field around it. An Electromagnet An electromagnet only is a magnet when current flows through its coil. Uses of Magnets Electric Motors Electric Bells Bicycle Dynamo Transformers Loudspeakers CTRs Computers Phones