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Plotting the magnetic lines of force around a bar magnet

In this post, you will get complete information about Plotting the magnetic lines of force around a bar magnet. Lines of force (Magnetic Fie...

In this post, you will get complete information about Plotting the magnetic lines of force around a bar magnet.

Lines of force (Magnetic Field Lines)

The space around a magnet where its influence can be felt is called magnetic field. line of fotce is an imaginary line along which an isolated north pole kept in a magnetic field tends to move. Lines of force, more appropriately, are referred to as magnetic field lines. 

Plotting the magnetic lines of force around a bar magnet and magnetic field lines around a bar magnet


Plotting the Magnetic Lines of Force Around a Bar Magnet 
  1.  Draw a line in the middle of a white paper fixed on a drawing board.
  2. Place a bar magnet NS on the line such that its axial line coincides with the line on the paper and mark its boundary. 
  3. Take a plotting compass and place it such that its S-pole is directed towards point O at the edge of the bar magnet, and mark the point 1 in the direction in which the north pole of the plotting compass points. 
    Mapping magnetic field lines 

  4. Repeat the procedure described in step (3), by shifting the compass and plot the points 2, 3, 4, etc.
  5.  Join the points 0, 1, 2, 3, ..... by a smooth Curve.

The magnetic line of force for a bar magnet is a closed continuous curve along which a unit
north pole will move, and its direction is given by the direction in which a free N-pole would point. The lines of force due to a bar magnet is shown in Fig. 2. The lines start at the north pole and end at the south pole. 



Magnetic field lines around a bar magnet 



Sprinkle some iron filings on a piece of paper and place it over a magnet. The iron filing arrange themselves in a certain pattern. It can be seen that the lines of force will be crowded near the poles. 

The number of magnetic lines of force passing perpendicularly through a certain area gires the magnetic flux.


Conclusion

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