Astraight wire carries a steady current, i1 = 10.0 a, along the entire z-axis. the current is directed in the positive z-direction. in the x-y plane: let ∠0° (south) be the positive x-axis; and let ∠90° (up) be the positive y-axis. a. give at least three reasons why there would be zero magnetic force acting on a particle located at point a. (use the above angle measurement system to specify all known angles in your reasoning.) b. suppose that an electron is at point a but moving directly toward the origin. evaluate (t/f/n) the following statement (and as always, explain your reasoning with a valid mix of words, equations, diagrams, etc.):