how is direction of .magnetic field lines at a point is determined?? please friends...it's urgent.....
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Tangent is drawn on magnetic fields lines to identify the the direction of magnetic field lines. The direction of the tangent drawn indicates the direction of magnetic field lines
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The direction of a magnetic field at a point is determined by placing a small compass needle. The N - pole of compass indicates the direction of magnetic field at that point. The properties of magnetic field lines are as follows. Magnetic field lines emerge from the north pole and merge at the south pole.
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