In the figure, what is the magnitude of magnetic field at the center off the two concentric arcs? The inner arc is of radius 4 cm and the outer arc is of radius 6 cm. The loop carries a current of 4 A. 2 3.49 x 10-6 T 2.09 x 10-5 T 7.14 x 10-4 T 4.45 x 10-5 T
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