Consider a current configuration shown be- low. A long (effectively infinite) wire segment is connected to a quarter of a circular arc with radius a....

Consider a current configuration shown be-low. A long (effectively infinite) wire segmentis connected to a quarter of a circular arc withradius a. The other end of the arc is connectedto another long horizontal wire segment. Thecurrent is flowing from the top coming downvertically and flows to the right along the pos-itive x-axis.