Answer:
These travel from North
Pole to South Pole to outside the magnet and South Pole to North Pole inside
the magnet.
(ii) These are closed and continue Curves.
(iii) Two magnetic field lines never
(iv)
The number of field lines per Unit area is the measure of the strength of
magnetic field, which is maximum at poles. The magnetic field is strong, where
the field lines are close together and weak where the lines are far apart
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