Electro motive force represents

Key Points

Electromotive force: The energy per unit electric charge that is imparted by an energy source (battery or electric generator) is called emf or electromotive force.

• Electromotive force is commonly denoted by the acronym emf, EMF or E.
• The SI unit for electromotive force is the volt.
• Electromotive force in a circuit maintains the potential difference.
• Electromotive Force (EMF) makes free electrons to flow in any closed circuit due to difference in electrical pressure or potential. Its unit is Volt.
• Volt is defined as work done per unit charge or energy consumed in bringing a charge from one point to another. 
• So, the Energy per unit charge is electromotive force.