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What is flux and flux density?!??? Give me answer of this question

What is flux and flux density?!??? Give me answer of this question

Grade:9

1 Answers

Arun
25750 Points
5 years ago
Around the magnet there is a magnetic field and this gives a ‘flow of magnetic energy’ around the magnet. It is this flow of energy that we call magnetic flux (Φ). We think of magnetic flux as flowing from the north pole of a magnet round to its south pole as shown by the arrows on the lines in the diagram. Looking at the diagram you should see that there is as much flux flowing ‘from the north pole’ as there is ‘flowing into the south pole’.
 
Magnetic flux is given the symbol Φ and is measured in units called Webers (Wb). 

However the amount of magnetic flux flowing through a given area will change from one point to another around the magnet and you can understand this by thinking about a loop of wire placed in the field at two different points (A and B). You can see that in position B there are a smaller number of magnetic field lines passing through the loop than there is when it is in position A.

We call the amount of flux passing through a unit area at right angles to the magnetic field lines the flux density (B)at that point.

Flux density is measured in Tesla (T) where 1 T = 1 Wbm-2

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