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Physics-magnetism

A coil in the shape of an equilateral triangle of side 0.02m is suspended from a vertex such that it is hanging in a vertical plane between the pole pieces of a permanent magnet producing a horizontal magnetic field of 5*10^-2 T.Find the couple acting on the coil.When a current of 0.1 ampere is passed through it and the magnetic field is parallel to its plane.
Problem-What will be the value of alpha in F=iLBsin(alpha) and how did we get the value of alpha?

 

Asked Astha

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