Question: For what emf E does the 200 resistor in FIGURE P28.64 dissipate no power? Should the emf be oriented with its positive terminal at

For what emf E does the 200 Ω resistor in FIGURE P28.64 dissipate no power? Should the emf be oriented with its positive terminal at the top or at the bottom?

100 0 300 N 50 V :200 N E? FIGURE P28.64

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