일반물리학 2 — Magnetic Fields: Problem 11

11 Two concentric, circular wire loops, of radii \(r_1 = 20.0 \text{ cm}\) and \(r_2 = 40.0 \text{ cm}\), are located in an \(xy\) plane; each carries a clockwise current of \(11.0 \text{ A}\) (Fig. 28-26). (a) Find the magnitude of the net magnetic dipole moment of the system. (b) Repeat for reversed current in the inner loop.