Question

What is the difference between EMF and MMF?

Answer 1

Hint : EMF stands for electromotive force. EMF is the force that is responsible for driving the electrons in an electric circuit. Magnetomotive force is abbreviated as MMF. MMF is the driving force required to drive the magnetic flux through the circuit.

Complete Step By Step Answer:

EMF	MMF
EMF stands for electromotive force.	MMF stands for magnetomotive force.
EMF acts as the driving force responsible for the movement of the electrons in an electrical circuit. EMF refers to the amount of work required to separate the charge carriers in a source current so that the force acting on the charges at the source's terminals is not a direct result of the field. Internal resistance causes the development of emf.EMF is greater than the potential difference between any two points in a circuit.	If we make current flow through a conductor coil, a force is produced that drives magnetic lines of flux known as magnetomotive force or MMF. In short, it is a driving force responsible for the creation of magnetic flux in a magnetic circuit.
The SI unit of EMF is volts.	The force is measured in Ampere-turn $\left( {AT} \right)$.
We can mathematically express EMF as, $E = \dfrac{W}{Q}$ Where $E$ is the electromotive force $W$ is the work done $Q$ is the charge	We can mathematically express MMF for an inductive coil as, $F = NI$Where $F$ is the magnetomotive force $N$ is the number of turns $I$ is the current.

Note :
The term EMF refers to the voltage produced by a source, such as a generator, battery, or photocell. In the case of magnetic circuits, the term MMF is used. In magnetic circuits, the term MMF is analogous to the term EMF in electric circuits.The magnetomotive force can also be expressed as the product of magnetic flux and magnetic reluctance $\left( {F = \varphi R} \right)$ .