Two beams of electrons, beam 1 and beam 2, are moving along
straight lines perpendicular to the page. We take the page to be
the xy-plane. Beam 1 is moving into the page and intersects the
page at point (−2, cm, 0 cm). Beam 2 is moving out of the page and
intersects the page at point (2, cm, 0 cm). The streams of
electrons are otherwise identical, each carrying current of
magnitude 2 A. A negatively-charged particle having charge...