AIPMT | 2014Magnetic field due to currentHard
Question
Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment 
. Which configuration has highest net magnetic dipole moment?
a.
b. 
c.
d. 
. Which configuration has highest net magnetic dipole moment? a.
b. c.
d. Options
A.a
B.b
C.c
D.d
Solution
a. 
b.
⇒ M2 = 0
c.
M2 = m
d.
M4 = 2 mcos30o
= m √3
b.
⇒ M2 = 0c.
M2 = m
d.
M4 = 2 mcos30o
= m √3
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