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The difference of potential between the terminals of a cell in closed circuit is called emf of the cell

electromotive force and accelerating force have the same dimensions

The internal resistance of an ideal cell is infinity

The difference between the emf of a cell and potential difference across the ends of the cell is called ‘lost volt’

answer is D.

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Detailed Solution

When the battery is discharging,

the terminals voltage of the battery is always ≤ Emf of cell [∵ r > 0]

∴ There will always be a difference which is defined to be lost volt.

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