The figure shows a cross section across a long cylindrical conductor of radius a = 2.55 cm carrying uniform current 22.4 A. What is the magnitude of the current's magnetic field at radial distance (a) 0, (b) 1.82 cm, (c) 2.55 cm (wire's surface), (d)4.99 cm? (a) Number i (b) Number i (c) Number i (d) Number i Units Units Units Units
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