In this article we will know about the difference between
electric field and magnetic field. We will also know about electromotive force.
Now we will know about electromotive force.
Electromotive Force
Electromotive force (EMF) drives a current of electrical
circuits, magneto motive force (MMF) drives magnetic flux through magnetic
circuits. The term magneto motive force, though, is a misnomer since it is not
a force nor is anything moving. It is perhaps better to call it simply MMF. In
analogy to the definition of EMF, the magnetic motive force around a closed
loop.
Difference between Electric field and Magnetic field
These are some difference between electric field and magnetic field which are given below.
Electric Field |
Magnetic Field |
1. In an electric field the
current actually flow , there is movement of electron
|
Due to MMF flux gets established and does not flow in the sense in
which current flows.
|
2. There are many materials which can be used as insulators that are air,
P.V.C synthetic resin etc. form which current cannot pass.
|
There is no magnetic insulator as flux can pass through all the
material, even though the air as well.
|
3. Energy must be supplied for an electric field to maintain the flow
of electric current.
|
Energy is required to create the magnetic flux, but is not required
to maintain it.
|
4. Electric lines of flux are not closed. They start from positive
charge and end on negative charge.
|
Magnetic lines of flux are closed lines. They flow from N pole to S
pole externally while S pole to N pole internally
|
5. Electric Field (EMF = Current x Resistance)
|
Magnetic Field ( MMF = Current x Reluctance )
|
6. There is continuous consumption of electrical energy.
|
Energy is required to create the magnetic flux and not to maintain
it.
|
7. EMF is the driving force in electric circuit, the unit is volts.
|
MMF is the driving force in the magnetic circuit, the unit of which
is ampere turns.
|
8. Kirchhoff”s current and and voltage law is applicable to the
electric field and circuit.
|
Kirchhoff”s MMF law and flux law is applicable to the magnetic field
and magnetic circuit. it is basic difference between electric field and magnetic field.
|
9. The flow of electrons decides the current in conductor.
|
The number of magnetic lines of force decides the flux.
|
Hence it is the difference between electric field and
magnetic field if you will find any incorrect above article please comment
below in comment box.
For knowing more about the difference between electric field
and magnetic field you must watch this video.