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Electromagnetic Induction Lab Report

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Introduction: Lab 5: Electromagnetic Induction Michael Faraday a renowned scientist determined that a current flowing in a wire generates an electric field. Induction which involves change in magn ... etic field leading to generation of and electromotive force (EMF) in a coil of wire. A good example of this application is the production of alternating current at power plants.Take for example a coil of wire,solenoid, as having a uniform magnetic field which is perpendicular to the plane of coils then the magnetic flux will be given by: Φ B =B·AEquation 1 :Field perpendicular to plane Where A is the cross sectional area of the coil and B is the uniform magnetic field inside the solenoid. If the field is not constant nor perpendicular to the coil, the flux can be generalized as: Φ B = ∑ B·ΔA(=∫B·dA) area Equation 2 :Non perpendicular fieldwhere ΔA is a vector with its magnitude being equal to a small unit of area (dA) and direction perpendicular to the loop, units being Tesla multiplied by meters squared. Faraday also proved that an EMF is induced in the coil of wire, when the flux changes in the loop of the solenoid, causing a current to move in the circuit. Through this proof, Faraday’s law can be written as: EMF =−NΔΦB (=−NdΦB ) Δt dt Equation 3 : Flux change 1 where N is the number of coils in the solenoid. The negative sign basically means that an induced current has a direction in which themagnetic field induced by the current opposes the change in flux that induced the current. A relation from the Lenz’s Law Experiment 1– A Changing Magnetic Field This experiment was run in order to qualitatively [Show More]

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