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Two similar bar magnets of magnetic mome...

Two similar bar magnets of magnetic moment M each are attached at right angle with each other at their ends. The magnetic moment of the system will be.

A

M

B

2M

C

`(M)/(sqrt(2))`

D

`sqrt(2)`M

Text Solution

Verified by Experts

The correct Answer is:
D
If the length of each magnet is L and pole -strength is m ,
m = mL
effective length of the system of the two magnets ,
`L'=sqrt(L^(2)+L^(2))=sqrt(2L)`
`therefore` Magnetic moment `m.sqrt(2L)=sqrt(2M)`
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