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The number of magnetic field lines passing through a given area is known as Magnetic flux. It is denoted by the symbol, and its unit is \(weber\) ().
![Flux_compression_1.png](https://resources.cdn.yaclass.in/72e84f84-4f91-4ef4-9179-86d06703fafd/Fluxcompression1w300.png)
Field lines crossing in a particular area
Magnetic flux density:
Magnetic flux density is defined as the number of magnetic field lines crossing a unit area in a direction that is normal to the direction of the field lines. is the unit of measurement for magnetic flux density.
Properties of magnetic lines of force:
- Magnetic lines of force are continuous, closed curves that run through the length of a magnet's body.
- Magnetic lines of force run from the north pole to the south pole.
- Magnetic lines of force never cross one another.
- Magnetic lines of force will be highest at the poles and lowest at the equator.
- The magnetic field direction is determined by the tangent drawn at any point on the curved line.
![bar-35424_1280.png](https://resources.cdn.yaclass.in/2902487a-2703-40c5-8f5f-e695b4114eaa/bar354241280w200.png)
North and south pole of a Bar-magnet
Reference:
https://commons.wikimedia.org/wiki/File:Flux_compression_1.png
https://pixabay.com/vectors/bar-magnet-magnetic-physics-poles-35424/