Question

If two identical bar magnets, each of length I , pole strength m and magnetic momen M are placed perpendicular to each other with their unlike poles in contact, the magnetic moment of the combination is

• A. $\frac{M}{\sqrt2}$
• B. $lm(\sqrt2)$
• C. $2lm(\sqrt2)$
• D. 2M

Answer 1

Answer: (B)

$lm(\sqrt2)$

Answer 2

$M' = \sqrt{2} M$