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[" 68.A square coil of edge "l" having "...

[" 68.A square coil of edge "l" having "n" turns carries allem "11.],[" i.It is kept on a smooth horizontal plates a cume "],[" magnetic field "B" exists in a direction parallel to anke,"],[" The total mass of the coil is "M" .What should to anke,"],[" minimum value of "B" for which the coil will start tims "],[" Consider a nonconducting ring of radius "r" and mast "],[" which has a total charge "q" distributed uniformly ar "(9 pi)/(98)],[" W.(a) Find the equivalent electric current in the "pi" is "],[" (b) Find the magnetic moment "mu" of the ring.( "g" ): "]

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