Tangent Law
Category : JEE Main & Advanced
When a small magnet is suspended in two uniform magnetic fields \[B\] and \[{{B}_{H}}\]which are at right angles to each other, the magnet comes to rest at an angle \[\theta \] with respect to \[{{B}_{H}}\].
In equilibrium
\[M{{B}_{H}}\sin \theta \]\[=MB\sin \,({{90}^{o}}-\theta )\]
\[\Rightarrow \] \[B={{B}_{H}}\tan \theta .\] This is called tangent law.
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