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M and Msqrt(3) are the magnetic dipole m...

M and `Msqrt(3)` are the magnetic dipole moments of the two magnets which are joined to form a cross figurre the inclination of the system with the fiedl if their combination is suspended freely in a uniform external magnetic field B is

A

`theta=30^(@)`

B

`theta=45^(@)`

C

`theta=60^(@)`

D

`theta=15^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
In equlibrium `tau_(1)=tau_(2)`
MB `sin theta =sqrt(3)` MB sin `(90^(@)-theta)`
`therefore tan theta =sqrt(3) rarr theta =60^(@)`
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