# What is EMF Full Form?

The EMF full form is Electromotive Force. An electrochemical cell or a change in the magnetic field produces an electric potential defined as Electromotive Force. We generally use a generator or a battery to convert energy from one form to another. There is one positively charged terminal and a negatively charged terminal inc such electrical devices. Electromotive force is also defined as work done on a unit of electric charge. It is commonly used in electromagnetic flowmeters which is an application of Faraday’s Law.

Also Read: How to Become an Electrical Engineer?

## What are the Formula and Unit of EMF?

The formula for the Electromotive Force is as follows:

E = V + Ir

In the formula,

• V is the voltage of the cell
• I is the current present throughout the circuit
• r is the internal resistance of the cell
• And E is the Electromotive force

Numerically, EMF is described as the number of Joules of energy supplied through the source upon each Coulomb to enable a unit electric charge to move across the circuit.

Volts = joules/coulombs

## What are the Characteristics of EMF?

The following are the characteristics of EMF:

• EMF is defined as the work done on a unit charge
• Electromotive force is independent of circuit resistance
• It remains constant
• Electric, magnetic and the gravitational field are caused due to EMF
• E is used to represent the electromotive force