EMF DefinitionEasyQuestion 31621
Question
EMF (electromotive force) of a cell is the work done by the cell per unit charge when:
- ACell is short-circuited
- BNo current flows (open circuit)Correct
- CMaximum current flows
- DCell is charging
Correct answer
No current flows (open circuit)
Explanation
EMF = work done per unit charge in the absence of current flow — it equals the open-circuit terminal voltage.