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23-12-2022
Physics

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a rectangular coil of n turns and of length a and width b is rotated at frequency f in a uniform magnetic field , as indicated in fig. 30-40. the coil is connected to co-rotating cylinders, against which metal brushes slide to make contact. (a) show that the emf induced in the coil is given (as a function of time t) by 2pfnabb sin(2pft) 0 sin(2pft).

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