alleryWhich of the following is INCORRECT about magnetic field lines?
ATheir density indicates field strength
BThey begin at the north pole and end abruptly in free space
CThey form continuous closed loops
DThey never intersect
Answer & Solution
Correct answer: B. They begin at the north pole and end abruptly in free space
Field lines never 'end abruptly'.
Outside the magnet they appear to go N→S, but they continue through the body of the magnet, forming closed loops.
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