HW 9 - 1./6 pointsNotesQuestion: Walker4 23.P.034. A long,...

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1. –/6 points Notes Question: Walker4 23.P.034. A long, straight wire carries a current  I . Three small metal rings are placed  near the current carrying wire ( A  and  C ) or directly on top of it ( B ). If the  current in the wire is flowing towards the  left  and is increasing with time,  indicate whether the induced emf in each of the loops is clockwise,  counterclockwise, or zero. loop  A  clockwise counterclockwise     zero Explain.   loop  B  clockwise counterclockwise     zero Explain.   loop  C  clockwise counterclockwise     zero Explain.   2. –/1 points Notes Question: Walker4 23.P.036. A metal rod  0.60  m long moves with a speed of 2.0 m/s perpendicular to a  magnetic field. If the induced emf between the ends of the rod is  0.90  V,  what is the strength of the magnetic field?    T 3. –/1 points Notes Question: Walker4 23.P.042.
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The maximum induced emf in a generator rotating at  223  rpm is  25  V. How  fast must the rotor of the generator rotate if it is to generate a maximum  induced emf of  75  V?    rpm 4. –/1 points Notes Question: Walker4 23.P.044. A 1.6-m wire is wound into a coil with a radius of  4.34  cm. If this coil is  rotated at  115  rpm in a 0.070-T magnetic field, what is its maximum emf?    mV 5. –/1 points Notes Question: Walker4 23.P.046. A generator is designed to produce a maximum emf of  130  V while rotating  with an angular speed of 3600 rpm. Each coil of the generator has an area  of  0.015  m 2 . If the magnetic field used in the generator has a magnitude of  0.050 T, how many turns of wire are needed?   turns
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This note was uploaded on 03/08/2012 for the course PHYS 115 taught by Professor Pedigo during the Spring '08 term at University of Washington.

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HW 9 - 1./6 pointsNotesQuestion: Walker4 23.P.034. A long,...

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