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Two long, parallel wires carry currents of I = 3.20 A and 2 = 4.65 A in the direction indicated in the figure below. (Choose the line running from wire 1 to wire 2 as the positive x-axis and the line running upward from wire 1 as the positive y-axis.)

1647_Two long parallel wires carry currents.png

(a) Find the magnitude and direction of the magnetic field at a point midway between the wires (d = 20.0 cm).

(b) Find the magnitude and direction of the magnetic field at point ρ₁, located d = 20.0 cm above the wire carrying the 4.65-A current.

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