The Diagrams Show Three Circuits Consisting of Concentric Circular Arcs

question 17

Multiple Choice

The diagrams show three circuits consisting of concentric circular arcs (either half or quarter circles of radii r, 2r, and 3r) and radial lengths.The circuits carry the same current.Rank them according to the magnitudes of the magnetic fields they produce at C, least to greatest.

• A)1, 2, 3
• B)3, 2, 1
• C)1, 3, 2
• D)2, 3, 1
• E)2, 1, 3

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