Two circular loops are parallel, coaxial, and almost in contact,1.07 mm apart (F

Question

Two circular loops are parallel, coaxial, and almost in contact,1.07 mm apart (Fig. P19.58). Each loop is9.0 cm in radius. The top loop carries aclockwise current of 140 A. The bottom loop carries acounterclockwise current of 140 A.

Two circular loops are parallel, coaxial, and almost in contact,1.07 mm apart (Fig. P19.58). Each loop is9.0 cm in radius. The top loop carries aclockwise current of 140 A. The bottom loop carries acounterclockwise current of 140 A. Figure P19.58 (a) Calculate the magnetic force that thebottom loop exerts on the top loop. (Hint: The distance between theloops is small in comparison to the radius of curvature, so theloops may be treated as long, straight, parallel wires.) (b) The upper loop has a mass of 0.0214kg. Calculate its acceleration, assuming that the only forcesacting on it are the force in part (a) and its weight.

Explanation / Answer

F=B*I*L=I0*I*2R/2d=I^2*0*R/d=2,07(N) -------------------------- a=F/m=(mg-2,07)/m=-87(m/s^2)

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