Two circular loops are parallel, coaxial, and almost in contact, 1.00 mm apart (Fig. P30.59). Each loop is 10.0 cm in radius. The top loop carries a clockwise current of 140 A. The bottom loop carries a counterclockwise current of 140 A.
(a) Calculate the magnetic force exerted by the bottom loop on the top loop.
(b) The upper loop has a mass of 0.021 0 kg. Calculate its acceleration, assuming that the only forces acting on it are the force in part (a) and the gravitational force. Suggestion: Think about how one loop looks to a bug perched on the other loop.

140 A 140 A