What is terminal voltage?

Asked by Rohan Rawal | 6th Sep, 2014, 08:11: PM

Expert Answer:

When current flows through the circuit, thers is a fall of potential across the internal resistnace of the cell. The potential difference between the two electrodes of the cell is less than the emf of the cell by an amount equal to the potential drop across the internal resistance.
Thus we can say that teminal voltage of a cell is the potential difference between the electrodes of the cell when current is drawn from the cell.It is measured by the amount of work done in moving a unit positive charge in the circuit outside the cell. More the current is drawn from the cell, less is the terminal voltage. Terminal voltage of a cell is equal to the emf of the cell when the cell is not in use.

Answered by Jyothi Nair | 8th Sep, 2014, 08:57: AM

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