State under which condition the terminal potential difference across a battery and its emf are equal.
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Answer:The potential difference between the terminals of a battery will equal the emf of the battery when there is no current in the battery. ... The terminal voltage will exceed the emf of the battery when current is driven backward through the battery, in at its positive terminal and out at its negative terminal."
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Answer:
The terminal potential difference is equal to the EMF when no current is drawn from the cell.
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