The diagrams show three circuits consisting of concentriccircular arcs (either half or quartercircles of radii r, 2r, and 3r) and radial lengths. The circuitscarry the same current. Rankthem according to the magnitudes of the magnetic fields theyproduce at C, least to greatest.

And HOW

Transcribed Image Text:

1 & C 2 C 3 C 1 & C 2 C 3 C