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Essay Galaxy - Lenz's Law and Faraday's Law of Induction Lenz's Law and Faraday's Law of Induction

1. With this definition of the flux being , we can now return to Faraday's investigations. He found that the magnitude of the emf produced depends on the rate at which the magnetic flux changes. Faraday found that if the flux through N loops of wire changes by an amount , during a time delta t, the average induced emf during this time is This fundamental result is known as Faraday's law of induction. The minus sign is placed there to remind us in which direction the induced emf acts. Experiment shows that an induced emf always gives rise to a current whose magnetic field opposes the original change in flux. This is known a Lenz's law. Let us apply it to the case of relative motion between a magnet and a coil. The changing flux induces an emf, which produces a current in the coil; and this induced curren....

Number Of Pages: 3 Number Of Words: 681

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