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(a) Write down an expression for the force experienced by a particle with charge q moving with velocity v in a magnetic field B . Under what circumstances does the particle mass m, of describe a circle of radius r ? (b) A coil of cross-sectional area A composed of N turns is placed perpendicular to a magnetic field which is uniform in space, with a strength that varies in time according to B = B0 cos(15t). Calculate the electromotive force induced in the coil. |
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