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The magnetic induction at a point P on t...

The magnetic induction at a point P on the axis is equal to the magnetic induction at a point Q on the equator of a short magnetic dipole. What is the ratio of the distances of P and Q from the centre of the dipole?

A

`1.26:1`

B

`12.6:1`

C

`2:1`

D

`1.62:1`

Text Solution

Verified by Experts

The correct Answer is:
A
`B_("axis")=B_(eq)`
`(mu_(0))/(4pi)2M/(r_(e)^(3))`
`therefore(r_(s)/r_(e))=3sqrt((2)/(1))=(1.26)/(1)`
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