Magnetic field due to currentHard
Question
Four very long straight wires carry equal electric currents in the +z direction. They intersect the xy plane at (x, y) = (-a, 0), (0, a), (a, 0), and (0, -a). The magnetic force exerted on the wire at position (-a, 0) is along :-
Options
A.+y
B.-y
C.+x
D.-x
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