A short bar magnet of magnetic moment 1....

A short bar magnet of magnetic moment `1.5 Am^2` is placed along x-axis at origin. If the magnetic field along line joining origin to point `[P(2 sqrt3,2,0)]`m is `[{sqrt(n) *10^-7} /128 (T)]`, Then n should be

A

3

B

27

C

9

D

16

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