GP Magnetism

Which one of the following statements about magnetic field lines is not correct?

  1. They can emanate from a point
  2. They do not cross each other
  3. Field lines between two poles cannot be precisely straight lines at the ends
  4. There are no filed lines within a bar magnet

Answer

The lines of magnetic field from a bar magnet form closed lines. The magnetic field is strongest inside the magnetic material.

The correct option is D.