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Two identical thin bar magnets each of...

Two identical thin bar magnets each of length l and pole strenght m are placed at right angles to each other with north pole of one touching south pole of the other . Magnetic moment of the system is

A

2 m l

B

`sqrt(2) ml`

C

`m l`

D

`2 sqrt(2) ml`

Text Solution

Verified by Experts

The correct Answer is:
D
M = 2 ml for one magnet .
for the combination .
`M_(R) = sqrt((2ml)^(2) + (2ml)^(2) + (2ml) (2ml) cos 90^(@))`
= 2 ml
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