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Problem Solution - Physics Courses

Problem Solution - Physics Courses

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Solution (a) The motional emf (mentioned in part (a) of the previous solution) is upward in the moving bar, and so acts like the positive terminal of a battery. Thus, the positive terminal of the voltmeter should be connected to the top rail in Fig. 31-49. (b) When an ideal voltmeter replaces the resistor, no current flows (since its

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