11 A rectangular coil of N turns and of length a and width b is rotated at frequency f in a uniform magnetic field B, 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 8 = 2mf NabB sin(2mft) = E, sin(27ft). This is the principle of the commercial alternating-current gen- erator. (b) What value of Nab gives an emf with E, = 150 V when the loop is rotated at 60.0 rev/s in a uniform magnetic field of 0.500 T? Sliding contacts - BX x x x x x x x x X X x x X X x X D. X/X

11 A rectangular coil of N turns and of length a and width b is rotated at frequency f in a uniform magnetic field B, 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 8 = 2mf NabB sin(2mft) = E, sin(27ft). This is the principle of the commercial alternating-current gen- erator. (b) What value of Nab gives an emf with E, = 150 V when the loop is rotated at 60.0 rev/s in a uniform magnetic field of 0.500 T? Sliding contacts - BX x x x x x x x x X X x x X X x X D. X/X

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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