Two concentric circular arcs of radii R and 2R subtend the same angle θ and are connected by radial segments. Current I flows around the two arcs in opposite senses. Select the correct statements for the common centre.
Select all that apply

Question

Two concentric circular arcs of radii R and 2R subtend the same angle θ and are connected by radial segments. Current I flows around the two arcs in opposite senses. Select the correct statements for the common centre.

Select all that apply

G1 Physics · Accepted Answer

Arc field varies as 1/R. Hence the inner arc gives twice the outer-arc field. Because their current senses are opposite, the fields oppose but do not cancel.