Question

Which of the following are true about magnetic field lines in a magnet?

• A. Field lines outside a magnet originates from North pole and ends at South pole.
• B. The field lines intersect each other.
• C. The field lines form closed loops.
• D. They originate outside the magnet from South pole and ends at North pole.

Answer 1

Answer: (A), (C)

The correct options are
A Field lines outside a magnet originates from North pole and ends at South pole.
C The field lines form closed loops.

Magnetic field lines always originates from North pole of a magnet and runs towards the South pole. Inside magnet it goes back to North pole from South and they never intersect each other because field lines behave as if they repel each-other.