The magnetic field at a point $P$ on the axis of a short bar magnet of magnetic moment $M$ is $B$. If another short bar magnet of magnetic moment 2 M is placed on the first magnet such that their axes are perpendicular and their centres coincide. The resultant magnetic field at the point $P$ due to both the magnets is
- A
$3 B$
- B
$\sqrt{3} B$
- C
$\sqrt{2} B$
- D
$2 B$
✓ Correct answer: C
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