PHY2049ch21A%281-8-10%29 - Electricity and Magnetism...

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Electricity and Magnetism pervades our modern world. We generate electric power (energy/second: Watts ) in power stations and transmit it down power lines to our homes where we use it for heating & cooling, lighting, cooking hot showers, computing, television, … and much more. While Its hard to imagine living without these wonderful modern conveniences electricity and magnetism are much more fundamental to our lives than even this suggests.
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Our understanding of the matter making up the world (including ourselves and all life) is that it is comprised of atoms of the elements: These atoms themselves are comprised of three, still smaller, constituents: Electrons , Protons and Neutrons
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