Question

3 identical bar magnets each of magnetic moments M,are placed in the form of an equilateral triangle with north pole of one touching the south pole of tbe other. The net magnetic moment of the system is

Answer 1

see figure, here three identical bar magnets each of magnetic moments M,are placed in the form of an equilateral triangle with north pole of one touching the south pole of tbe other.

we know, direction of magnetic moment from south pole to North.

see figure, here direction of all magnetic field are shown.

we know according to $\textbf{vector triangle rule}$ if ABC is triangle formed by vectors $\vec{AB}$, $\vec{BC}$, $\vec{CA}$ then,

$\vec{AB}+\vec{BC}+\vec{CA}=0$

applying above rule , we get resultant magnetic moment = 0.

Answer 2

Answer:

the above answer is perfectly correct