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[" 9.Two identical circular loops "P" an...

[" 9.Two identical circular loops "P" and "Q" ,each of "],[" radius "r" and carrying equal currents are kept in "],[" the parallel planes having a common axis "],[" passing through "O" ."],[" The direction of current in "P" is clockwise and in "],[Q" is anti-clockwise as seen from "O" ,which is "],[" equidistant from the loops "P" and "Q" .Find the "],[" magnitude of the net magnetic field at "0" ."],[qquad [" Delhi "2012],[" maghitul "],[qquad (1)/(1),quad dot 0]]

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