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The Emf and the Internal Resistance of a Battery Are

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The emf and the internal resistance of a battery are shown in the figure. If a current of 7.8 A is established through the battery from b to a, what is the terminal voltage Vab of the battery? The emf and the internal resistance of a battery are shown in the figure. If a current of 7.8 A is established through the battery from b to a, what is the terminal voltage V<sub>ab</sub> of the battery?   A)  -30 V B)  80 V C)  30 V D)  -80 V E)  zero


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