A coaxial cable consists of an inner cylindrical conductor of radius r1 = 1.44 mm inside a hollow cylindrical conductor of radius r2 = 4.32 mm. Charges on the surfaces of these conductors produce the field lines shown in the figure below. The field lines are equally spaced along the axis of the cable. If the magnitude of the field just outside the inner conductor is 570 N/C, what is the magnitude of the field just inside the outer conductor?
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