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P219lecture10induction

# P219lecture10induction - Goal To understand how induction...

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Goal: To understand how induction helps power our everyday lives Objectives: 1) To learn how to produce a Motional EMF 2) To be able to calculate Magnetic Flux 3) To learn about Faraday’s Law

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Motional Electro-Magnetic Force (EMF) When a charge moves there is a force on it. If used properly you can use this to generate a current (energy). A lot of electricity is generated by generators. To do this you move metal through a magnetic field. The charges will move perpendicular to that. This creates a current.
Magnetic Flux Magnetic Flux is just a measure of the amount of magnetic field contained within some area. Magnetic Flux is in units of Webers (Wb) 1 Wb = 1 T * m 2 If the plane of some wire or object is tilted at an angle of θ towards or away from the plane of magnetic field lines the the Magnetic Flux is just: Φ = B * A * cos(θ) A is area and A * cos(θ) is the effective area inside the field.

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You try one: You have a magnetic field of 20 T. You put a circular wire perpendicular to
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P219lecture10induction - Goal To understand how induction...

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