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

Options

A. potential varies as `(1)/(r^(2))`
B. potential is zero at all points on the right bisector
C. field varies as `r^(2)`
D. field is perpendicular to the axis of dipole

Answer

A

Explanation

The magnetic potential due to a magnetic dipole at distance r is `v=(mu_())/(4pi)(M cos theta)/(r^(2))`
On the right bisector (ie, on axial line),` theta=0^(@)`
`therefore V=(mu_(0))/(4pi)(M)/(r^(2)) or V alpha (1)/(r^(2))`