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[" A circular loop of radius "a" ,carryi...

[" A circular loop of radius "a" ,carrying a current "i" ,is placed "],[" in a two-dimensional magnetic field.The centre of the "],[" loop coincides with the centre of the field (figure "34." E4"],[" The strength of the magnetic field at the periphery of "],[" the loop is "B" .Find the magnetic force on the wire."],[qquad (-a*-)'rarr B],[" I "]

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