what is the difference between magnetic flux and a magnetic field?

Answer 1

Magnetic Flux :

Magnetic flux, is a measure of quantity of magnetism, taking account of the strength and the extent of a magnetic field. The SI unit of magnetic flux is the weber, and the unit of magnetic flux density is the weber per square meter, or tesla.

For more detailed information please see http://en.wikipedia.org/wiki/Magnetic_flux

Magnetic Field :

magnetic field is that part of the electromagnetic field that exists when there is a changing electric field. A changing electric field can be caused by the movement of an electrically charged object, as in an electric current; or a combination of the orbit of an electron around an atom and the spin of electrons themselves, as in a permanent magnet.

For more detailed information please see http://en.wikipedia.org/wiki/Magnetic_field

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Answer 2

A field is a set of all points where some physical effect is felt.

For example, if a mass placed at some point in a region is acted upon a force (push or pull) then we say that there is some gravitational field.

If a charge placed at that point is experiencing a force we say that there is some electric field.

If a small magnetic needle placed at that point is oriented at a particular direction then we say that there is a magnetic field.

The intensity of the field is measured by the force acting on unit mass in the case of gravitational field; on unit charge in the case of electric field, and on unit magnetic pole in the case of magnetic field.

Under the action of force the unit quantity will move along a path if left free to move.

This path is called line of force.

In a filed there will be many lines of forces.

If we imagine a surface through which these lines of forces cross, then the number of lines of force crossing
the area is called flux.


Suppose we have a unit pole. How many lines of forces will emanate from this pole?

In SI system, each pole of one weber will emanate one line or (tube) of force.

Pole strength of m weber will have a flux of m weber.

Suppose we have a pole of strength m, the force per unit pole (intensity of field) at a point distant R from this pole is
F = m / (4pi mu0 mur R^2).

But 4 pi R^2 is the area A of a sphere of radius R around this pole.

Therefore, F = m/ (A mu0 mur)

If intensity is uniform over an area A, then the flux (number of lines crossing the area) is F x (A mu0 mur).

Thus the concept of pole is eliminated when we use the flux.

Given the intensity we can find the flux (number of lines crossing the area) and vice versa.

In magnetism the flux per unit area called ‘induction or flux density) is more important term than the flux itself.

Answer 3

Now thats a good one to think.
Magnetic flux can be described as the lines of action of a magnetic force. It is the path along which the magnetic force acts between the poles. In other terms, it can be the variuos means by which a unit pole moves in the presence of that magnet.

However, magnetic field is the area of impact, or that area over which the magnet has significant impact on a unit pole. A set of all flux patterns can represent a field. magnetic field is always three dimensional, but a magnetic flux is two dimensional, while the line of force is unidimensional.

Answer 4

A magnetic field is that part of the electromagnetic field that exists when there is a changing electric field. A changing electric field can be caused by the movement of an electrically charged object, as in an electric current; or a combination of the orbit of an electron around an atom and the spin of electrons themselves, as in a permanent magnet. Magnetic flux is the product of the average magnetic field times the perpendicular area that it penetrates.

Answer 5

Flux is the total amount of magnetic field that goes through a particular surface. The magnetic field itself exists throughout space independent of any surface you draw.

Answer 6

The flux are the lines of force emmenating from the source. The field are the equipotential lines where the magnitude of the force is equal at every place on that line.

The force lines are the lines with which something tends to travel when entering the field of the magnet.

Answer 7

magnetic flux is magnetic field per unit area.

Answer 8

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