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Red group - Magnetism 3 - Coggle Diagram
Red group - Magnetism 3
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Flowing electricity produces a magnetic field that encircles the wire carrying the electric current.
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Some farmers give their cows a magnet to swallow. This small magnet attracts nails and wire a cow accidentally eats. Without the magnets, the metal would pass through the cow’s stomach and damage the cow’s other organs.
Breakfast cereal often contains iron. Some cereals contain enough iron that it’s pieces are attracted to a magnet.
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Everything is made up of atoms, and each atom has a nucleus made of neutrons and protons with electrons that orbit around the nucleus.
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The first magnets were not invented, but rather were found from a naturally occurring mineral called magnetite.
Traditionally, the ancient Greeks were the discoverers of magnetite.
The magnetic force is a consequence of the electromagnetic force, one of the four fundamental forces of nature, and is caused by the motion of charges.
Two objects containing charge with the same direction of motion have a magnetic attraction force between them.
Similarly, objects with charge moving in opposite directions have a repulsive force between them.
Consider two objects. The magnitude of the magnetic force between them depends on how much charge is in how much motion in each of the two objects and how far apart they are.
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Magnets that are the opposite charge, attract to eachother
Magnets that are the same charge repel, and do not attract to eachother
Nikola Tesla
he saw clearly in his mind an iron rotor spinning rapidly in an rotating magnetic field produced by the interaction of two alternating currents out of step with each other.
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