What are magnetic field lines? Justify the following statements
(a) Two magnetic field lines never intersect each other.
(b) Magnetic field lines are closed curves.
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If two lines meet, it means that force is acting in two directions at that point which is not possible. (ii) The direction of field lines outside a magnet is from north pole to south pole while it is from south to north pole inside the magnet and thus forms closed curves.
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