Properties of Magnetic Field Lines
Magnetic Fields lines are continuous and closed curves travelings from north pole to South pole outside the magnet and from South pole to North pole inside the body of the magnet.
The tangent at any point on the magnetic field lines gives the direction of the strength of magnetic field B at that point.
Two magnetic field lines do not intersect or cross each other. If they cross each other, then at the point of intersection there will be two directions of the magnetic field at a single point, which is not possible.
Widely spaced field lines represent weak magnetic field and closely spaced field lines represent the strong magnetic field.
Magnetic field lines dilate laterally but they contract longitudinally.
Although magnetic field lines are not real yet they represent a magnetic field which is real.
Difference between Magnetic Field and Electric Field
- Electric field lines are generally discontinuous, whereas magnetic field lines are continuous and closed curves.
- Electric field lines do not exist within the charged conductor whereas magnetic field lines exist within the body of a magnet.
- As electric field lines do not exist within the charged conductor, the electric field inside the charged conductor is zero but the magnetic field is never zero inside a magnet.
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