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A magnet of length 14 cm and magnetic mo...

A magnet of length `14 cm` and magnetic moment `mu` is broken into two parts of length 6 cm and 8 cm. They are put at right angles to each other with the opposite poles togather. The magnetic dipole moment of the combination is:

A

`mu//1.4`

B

`mu`

C

`1.4 mu`

D

`2.8 mu`

Text Solution

Verified by Experts

The correct Answer is:
A
The pole strength remains unchanged but distance between the poles becomes `=sqrt(8^(2)+6^(2))=10 cm`, so magnetic dipole moment of the combination.
`mu^(')=mxx10=mxx14/14xx10`
`=(mxx14)/1.4=mu/1.4`
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