two parallel wires carrying equal currents in opposite direction are placed at X= +-a ,parallel to y axis with z= 0 . Magnetic field at origin O is B1 and P (2a,0,0) is B2 .Then the ratio B1/B2 is???
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Two parallel wire carrying equal currents in opposite directions are placed at
parralel to y-axis with
. Magnetic field at origin O is
and at
. Then, the ratio
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