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Electromagnetism - Coggle Diagram
Electromagnetism
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On Earth, the north arrow on a magnetic compass will point towards the geographic North Pole (in the Arctic Ocean)
This is because the geographic North Pole is a magnetic south pole (the magnetic field lines point into the pole)
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The geographic South Pole (in Antarctica) is a magnetic north pole (the magnetic field lines point out of the pole)
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On Earth, in the absence of any magnet or magnetic materials, a magnetic compass will always point north
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Very few metals in the periodic table are magnetic:iron, nickel and cobalt.
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To test whether a metal is magnetic, you should hold the metal close to the magnet.
If it is repelled by the known magnet, then the material itself is magnetic.
If it is attracted only and not repelled, then the material itself is magnetic.
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All magnets have a magnetic field which is a region around a magnet where a force acts on another magnet or a magnetic material.
Magnetic field lines are used to represent the strength and direction of a magnetic field. The strength is shown by the space between the magnetic field lines and direction is shown by the direction in which the arrows are pointing. Magnetic field lines always go from north the south and must never touch or cross other field lines.
Force of Attraction
The magnetic field lines are the same distance apart between the gaps of the poles to indicate that the field strength is the same at every point between the poles
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To show that the magnetic field has the same strength at all points there must be equal spacing between all magnetic field lines
To show that the magnetic field is acting in the same direction at all points there must be an arrow on each magnetic field line going from the north pole to the south pole
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