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The magnitude of magnetic induction due ...

The magnitude of magnetic induction due to a short magnetic dipole of moment `4xx10^(-3) Am^(2)` at a diostance of 50 cm from its centre on axis is

A

`4.4 xx10^(-9) T`

B

`6.4xx10^(-9)T`

C

`3.4 xx 10^(-9)T`

D

`2.4xx10^(-9) T`

Text Solution

Verified by Experts

The correct Answer is:
B
`B_(axis)=(mu_(0))/(4pi)(2M)/(r^(3))=(10^(-7)xx2xx4xx10^(-3))/(125xx10^(-3))=6.4xx10^(-9)T`
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