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Let r be the distance of a point on the ...

Let `r` be the distance of a point on the axis of a magnetic dipole from its centre. The magnetic field at such a point is proportional to

A

`(1)/(r)`

B

`(1)/(r^(2))`

C

`(1)/(r^(3))`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
As we know that , the magnetic field at a point due to the dipole is given by `B=(mu_0)/(4pi).(M)/(r^(3))sqrt(1+3cos^(2)theta)`
Where, M is magnetic dipole moment.
`Rightarrow " " B alpha (1)/(r^(3))`
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