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A magnetised needle of magnetic moment 4...

A magnetised needle of magnetic moment `4.8xx10^(-2)JT^(-1)` ispivoted through the centre of its mass and is free to rotate in the plane of the magnetic field of the magnitude `3xx10^(-2)`T. If the needed is displaced slightly from its stable equilibrium and releaased, predict the angular frequency of its oscillations. The moment bof inertia of the needle about its axis of rotation is given to be `2.25xx10^(-5)kgm^(2)`.

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