The magnetic lines of force inside a bar magnet
are from northpole to southpole of the magnet
do not exist
depend upon the area of crosssection of the bar magnet
are from southpole to northpole of the magnet.
As we learnt in
Magnetic field -
Space around a magnetic Pole or magnet or current carrying wire within which its effect can be experienced.
- wherein
The magnetic lines of force inside a bar magnet are from south pole to north pole of magnet.
Option 1)
are from northpole to southpole of the magnet
Incorrect
Option 2)
do not exist
Incorrect
Option 3)
depend upon the area of crosssection of the bar magnet
Incorrect
Option 4)
are from southpole to northpole of the magnet.
Correct
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