1. A wire carries current / down the +y axis from infinity to the origin. It then bends 90 degrees and runs out to infinity along the + x axis. . P(xy) (a) Find the magnetic field at any point P in the Ist quadrant of the xy plane (3 > 0, y > 0.) (b) Find the field in the limit z -+ co and interpret the result. 2. Finite Solenoid. A solenoid has length L, radius R, and total number of turns N. The current through the solenoid is I. (Assume that N is large enough that we can consider the solenoid as a stack of circular loops, rather than as a helical wire.) Current flows out of the page Current flows Center Into the page (a) Find the magnetic field at the center of the solenoid. (b) Show that in the limit L + co, your expression reduces to something familiar. (c) Find the magnetic field at an end of the (finite length) solenoid on its axis