Rankers Physics
Topic: Magnetic Effects of Current
Subtopic: Bar Magnet

Two bar magnets with magnetic moments 2M and M are fastened together at right angles to each other at their centres to form a crossed system, which can rotate freely about a vertical axis through the centre. The crossed system sets in earth's magnetic field with magnet having magnetic moment 2M making and angle θ with the magnetic meridian such that :
\[\theta=tan^{-1}\left( \frac{1}{\sqrt{3}} \right)\]
\[\theta=tan^{-1}\left( \sqrt{3} \right)\]
\[\theta=tan^{-1}\left( \frac{1}{{2}} \right)\]
\[\theta=tan^{-1}\left( \frac{3}{{4}} \right)\]

No solution provided for this question.

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