Question

Identify the correct statement about the magnetic field lines

• A. These start from the N-pole and terminate on the S-pole
• B. These lines always form closed loops
• C. Both (a) and (b) are correct
• D. Both (a) and (b) are wrong

Answer 1

The correct option is B These lines always form closed loops

The magnetic field lines of a simple magnet are shown in the picture below.They point from the north pole to the south pole. However, the magnetic field lines do not just end at the tip of the magnet. They go right through it, so that inside the magnet the magnetic field points from the south pole to the north pole.
Magnetic field lines form closed loops since magnetic monopoles doesn't exist unlike an electric charge.