Question
State two differences between the e.m.f and terminal voltage of a cell.
✓
Answer
| e.m.f. of cell | Terminal voltage of cell | ||
| 1 | It is measured by the amount of work done in moving a unit positive charge in the complete circuit inside and outside the cell. | 1 | It is measured by the amount of work done in moving a unit positive charge in the circuit outside the cell. |
| 2 | It is the characteristic of the cell i.e., it does not depend on the amount of current drawn from the cell | 2 | It depends on the amount of current drawn from the cell. More the current is drawn from the cell, less is the terminal voltage. |
| 3 | It is equal to the terminal voltage when cell is not in use, while greater than the terminal voltage when cell is in use. | 3 | It is equal to the emf of cell when cell is not in use, while less than the emf when cell is in use. |
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