How many revolutions will it make before coming to rest

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Given an aluminum disc of radius R, thickness d, conductivity σ , and mass density ρ spins on its axis with initial velocity Ωo . It passes through poles of a magnet producing a magnetic field perpindicular to the disc over a small area A. With this initial speed how many revolutions will it make before coming to rest?

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Reference no: EM13905001

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