Question

Magnetic field lines of two magnets are shown in fig. A and fig. B.

Select the figure that represents the correct pattern of field lines. Give reasons for your answer. Also name the poles of the magnets facing each other.

Answer 1

Figure B represents the correct pattern of field lines. In figure A, field lines cross each other which is not possible because if they cross each other, at the point of intersection, there would be two directions of field lines. 

In figure B, field lines are emerging in nature, so poles of magnet facing each other are north poles while opposite faces will have south polarity.