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When a current of 2 A flows in a battery from negative to positive terminal...

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When a current of 2 A flows in a battery from negative to positive terminal the potential difference across it is 12 V If a current of 3 A flowing in the opposite direction produces a potential difference of 15 V the emf of the battery is a 12 6 V b 13 2 V c 13 5 V d 14 0 V

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