MCQ
Electromotive force of a battery represents:
- AForce.
- BEnergy.
- ✓Electric potential energy per unit charge.
- DCurrent.
✓
Answer
Correct option: C.
Electric potential energy per unit charge.
When a voltage is generated by a battery, this generated voltage has been traditionally called an electromotive force or emf. The emf represents electric potential energy per unit charge $($voltage$)$ which has been made available to free electrons by the generating mechanism and is not a force.
The term emf is useful to distinguish voltage generated by the battery from those which occur in a circuit as a result of energy dissipation $($ Like Voltage drop across a resistor$).$
The term emf is useful to distinguish voltage generated by the battery from those which occur in a circuit as a result of energy dissipation $($ Like Voltage drop across a resistor$).$
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