A way to produce a fairly uniform magnetic field over a large accessible region is with a pair of identical circular loops of wire those shares the same axis and are physically parallel to each other, but whose centers are a certain distance apart. Every carries equal current in the same direction. Consider the case in which the loops are both parallel to the y-z plane, their common axis being the x-axis, and with diameters of 48.0cm. Each carries a current of 4.30 A and they are 30.0cm apart and equidistant from the origin. Presume a particle of charge +e, where e is the fundamental charge, is at the origin, moving in the +y-direction at speed 2950m/s.