question_answer

At a point on the right bisector of a magnetic      dipole, the magnetic :

A)                  potential varies as \[\frac{1}{r2}\]

B)                  potential is zero at all points on the right bisector

C)                  field varies as r3

D)                  field is perpendicular to the axis of the dipole

Correct Answer: B

Solution :

                Magnetic field at P due to north and south pole can be resolved into components parallel to the axis of the dipole and along-the bisector. Components along the bisector cancel out. The horizontal components add up