Question

Which of the following statements is true regarding magnetic fields lines for a permanent magnet?

(i) Inside the magnet, the magnetic field lines point from the south pole of the magnet to the north pole of the magnet.

(ii) Outside the magnet, the magnetic field lines point from the north pole of the magnet to the south pole of the magnet.

(iii) Magnetic fields never have a starting point or an ending point.

Answer 1

All the above statements regarding magnetic field lines for a permanent magnet is true.

This can be explained by properties of magnetic field lines of a permanent magnet as follows:

(i) They are closed continuous curves, hence they will never have a starting point or an ending point.

(ii) They behave like stretched elastic strings

(iii) They do not intersect one another.

(Iv) They are directed from north to south pole outside the magnet and south to north pole inside the magnet.