Question

Two parallel long (infinite for our purposes) wires are oriented along the z-axis. The figure below shows the (xy)-plane perpendicular to the wires, including the positions where the wires cross this plane. The wires carry some unknown electric currents 11 and 12, which you need to find from a single measurement of the magnetic field B=Bx i + By j at point A, whose position in the plane is also indicated. We will treat the currents algebraically: the current I is positive when it runs in the direction of the z-axis and negative when it runs in the opposite direction. In the right-hand system of coordinates, the z-axis is directed out of the screen towards us. The geometric parameters are known: a=1.12 cm, b=0.88 cm. 1 12 a a Given the measurement of the magnetic field: By=-0.44 G and By=1 G, what is the unknown current 1;?: 11= A. What is the unknown current 12?: 12= A.

Answer 1

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