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By electromotive force we mean ....

By electromotive force we mean .

A

the potential difference of a cell measured when there is a flow of current from the anode to the cathode and the cell is operationg irreversibly

B

the potential difference of a cell measured when there is a flow of current from the cathode to the anode and the cell is operation reversibly

C

the potential difference of a cell when there is no flow of current and the cell is operating irreversibly

D

the potential difference of a cell when there is no flow of current and the cell is operating reversibly

Text Solution

Verified by Experts

The correct Answer is:
D
Ans (4) : this can be measured by imposing externally a voltage equal to that of cell potential `(E_("cell")^Ө)`. As a result, there is no flow of current and the cell operates reversibly. This is done with the help of potentiometer
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