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Week9_2 - AC Generators Electric generators take in energy...

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1 AC Generators Electric generators take in energy by work and transfer it out by electrical transmission The AC generator consists of a loop of wire rotated by some external means in a magnetic field
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2 Induced emf In an AC Generator The induced emf in the loops is This is sinusoidal, with ε max = N A B ω sin B d N dt NAB t ε ω ω Φ = − =
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3 Lenz’ Law Faraday’s Law indicates the induced emf and the change in flux have opposite algebraic signs This has a physical interpretation that has come to be known as Lenz’ Law It was developed by a German physicist, Heinrich Lenz
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