Question

Figure shows a magnetised needle $P$ placed at a point $O$. The arrows show the direction of the magnetic moment. The other arrows show different positions (and orientations of the magnetic moment) of another identical magnetised needle $Q$. The dotted line represent a circle centre at the midpoint of $P$.
Which configuration in this system corresponds to stable equilibrium?

• A. $P{Q}_1$, $P{Q}_3$
• B. $P{Q}_3$, $P{Q}_5$
• C. $P{Q}_2$, $P{Q}_4$
• D. $P{Q}_2$, $P{Q}_3$

Answer 1

The correct option is C $P{Q}_2$, $P{Q}_4$

${PQ}_2$ and ${PQ}_4$

because they are opposite to each other.