A small bar magnet placed with its axis at with the external field of 0.06T experiences a torque of 0.018 Nm. The minimum work required to rotate it from its stable to unstable equilibrium position is:
Option: 1
Option: 2
Option: 3
Option: 4
Here,
And Torque on a bar magnet
Now using
Position of stable equilibrium
Position of unstable equilibrium
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