A long wire carries some current I. Although this is a straight wire except for one square loop KLMN. Find the direction and magnitude of the magnetic field B at some point P.
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In Figure P19.58 the current in the long, straight wire is I1 = 5.00 A, and the wire lies in the plane of the rectangular loop, which carries 10.0 A. The dimensions shown are c = 0.100 m, a = 0.150 m, and ℓ = 0.450 m. Find the magnitude and direction of the net force exerted by the magnetic field due to the straight wire on the loop.
