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Q.

Choose the correct statement 

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a

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

b

electromotive force and accelerating force have the same dimensions

c

The internal resistance of an ideal cell is infinity

d

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

answer is D.

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Detailed Solution

The internal resistance of an ideal cell is 0. 

The emf of a cell need not be the same as the potential difference across its terminals. This difference between the emf of a cell and potential difference across the ends of the cell is called ‘lost volt’.

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