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Unformatted text preview: Maxwells Equations Maxwells Equations arent really Maxwellswith the possible exception of the last one. They are Gausss, Faradays, and Ampres, and you have mostly already been introduced to them: Gausss law says that the electric field through an enclosing surface is proportional to the charge inside: E = Q in /A . Gauss also discovered that magnetic flux lines do not have starting or ending points, but so far we have treated that as a concept instead of an equation. Faradays law, meantime, was used to predict the induced voltage from a changing magnetic flux: V = -N / t . Finally, Ampres law was employed to predict the magnetic field encircling a linear current-carrier: B = I/2 r . All of these equations can be stated in a more general form using calculus. Imagine that we are no longer limited to spheres, cylinders, and planes in applying Gausss law, but can instead add up (integrate) all the electric field in every direction passing through a...
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This note was uploaded on 04/05/2012 for the course PHYS 131 taught by Professor Tibbets during the Spring '11 term at Cuyamaca College.
- Spring '11