A bar magnet of length $$10$$ cm and having the pole strength equal to $$10$$–$$3$$ weber is kept in a magnetic field having magnetic induction (B) equal to $$4$$π×$$10$$−$$3$$ Tesla. It makes an angle of $$30o$$ with the direction of magnetic induction. The value of the torque acting on the magnet isμ$$0=4$$π×$$10$$−$$7weber/amp$$×m

Question

A bar magnet of length $$10$$ cm and having the pole strength equal to $$10$$–$$3$$ weber is kept in a magnetic field having magnetic induction (B) equal to $$4$$π×$$10$$−$$3$$ Tesla. It makes an angle of $$30o$$ with the direction of magnetic induction. The value of the torque acting on the magnet isμ$$0=4$$π×$$10$$−$$7weber/amp$$×m

Infinity Learn · Accepted Answer

Torque τ$$=MBHsin$$θ$$=0.1$$×$$10$$−$$3$$×$$4$$π×$$10$$−$$3$$×$$sin$$⁡$$30$$∘$$=10$$−$$7$$×$$4$$π×$$12=2$$π×$$10$$−$$7N$$×m

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