How magnetic flux can be zero when the magnetic field is not zero?
The magnetic flux is generated when there is change in the magnitude of the magnetic field as well as its direction. If the magnetic field is parallel to the place of the area exposed then the magnetic flux generated is zero when the magnetic field is not zero.
Why magnetic flux is zero in a closed surface?
Because magnetic field lines are continuous loops, all closed surfaces have as many magnetic field lines going in as coming out. Hence, the net magnetic flux through a closed surface is zero.
What is flux in magnet?
Magnetic flux is a measurement of the total magnetic field which passes through a given area. It is a useful tool for helping describe the effects of the magnetic force on something occupying a given area.
What is cutting of magnetic flux?
When a magnet falls through a long metal tube, the field lines of the magnet cut the tube. This is flux cutting. When the flux of the primary coil in a transformer changes, the flux linked with the secondary coil changes. This is flux linking.
What is the difference between magnetic flux and magnetic field?
Magnetic field describes a region where a magnetic force can be felt. Magnetic flux describes how much magnetic field passes through an area.
What is the relation between magnetic flux and magnetic flux density?
The main difference between magnetic flux and magnetic flux density is that magnetic flux is a scalar quantity whereas magnetic flux density is a vector quantity. Magnetic flux is the scalar product of the magnetic flux density and the area vector.
What causes magnetic flux?
Any induced current in a coil will result in a magnetic flux that is opposite to the original changing flux. toward a conducting loop, the induced current produces a north pole pointing toward the magnet’s north pole. This creates a repulsive force opposing the change that caused the current.
What is a closed surface in physics?
Closed surface is simply any kind of surface which contain a volume of space enclosed from all the directions. For example, cube, cylinder, sphere, or any other random shape which has closed surface from all the directions are considered to be closed surfaces.
What is magnetic flux symbol?
A sub-discipline of physics in the field of electromagnetism is the magnetic flux through a surface, which refers to the surface integral of the magnetic field’s (B) normal component passing through that surface. Magnetic flux is denoted by the Greek letter Phi and has the symbol Φ or ΦB.
How does magnetic flux cutting produce current?
As a conductor cuts across the lines of force in a magnetic field, it generates a current. When a conductor cuts through lines of force, it induces an electromotive force (EMF), or voltage. Either the magnetic field or the conductor needs to be moving for this to happen.
What changes magnetic flux?
There are three ways to change the magnetic flux through a loop: Change the magnetic field strength (increase, decrease) over the surface area. Change the area of the loop (increase by expanding the loop, decrease by shrinking the loop) Remember that flux is the integral of the dot product between B and dA.
How magnetizing force H is related to MMF?
Hence, mmf = NI = Hl At. For air, or any non-magnetic medium, the ratio of magnetic flux density to magnetising force is a constant, i.e. B H = a c o n s tan t . This constant is µ0, the permeability of free space (or the magnetic space constant) and is equal to 4π
What happens when two magnets are near each other?
When two magnets are brought close together, the magnetic field lines are perturbed, just as happens for electric field lines when two electric charges are brought together. Bringing two north poles together—or two south poles—will cause a repulsion, and the magnetic field lines will bend away from each other.
What is the difference between magnetic flux and current?
Change in the number of field lines through a coil gives a current. Number of field lines through a coil is called magnetic flux. When a loop is moved parallel to a uniform magnetic field, there is no change in the number of field lines passing through the loop and no induced current.
What is the source of magnetic flux through the coil?
This magnetic field passes through the loop and is the source of magnetic flux through the coil. As the loop slides by position 1, the flux through the loop is INCREASING and it is Pointing OUT OF THE PAGE. As the loop slides by position 2 the flux through the loop is DECREASING and it is pointing INTO THE PAGE.
How does a magnet change the orientation of a metal?
Changing a magnetic field (moving a magnet) next to a non-magnetic metal will induce an electric field (a voltage difference) in the metal, which subsequently generates a magnetic field with an opposite orientation with respect to your magnet. When your magnet moves next to a metal it creates these fields, but the fields act in a very specific way.