question_answer

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

A)  potential varies as\[\frac{1}{{{r}^{2}}}\]

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

C)  field varies as\[{{r}^{3}}\]

D)  field is perpendicular to the axis of dipole

Correct Answer: B

Solution :

 Magnetic field at P due to north & 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