PHY 114 Midterm: PHYS 114 University of Rochester P114 2010 Exam 1
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Please read the problems carefully and answer them in the space provided. Write on the back of the page, if necessary. The sketch below shows four situations in which charged particles are fixed in place on an axis. The sketch below shows three situations involving a charged particle and a uniformly charged spherical shell. The charges are given, and the radii of the shells are indicated. 1 , 2 and 3 , rank the situations according to the magnitude of the force on the particle due to the presence of the shell, greatest first. Use the same number more than once in cases where more than one situation has the same magnitude of force. A closed three-dimensional surface is so constructed that, at all points on the surface, the electric field vector points inward. A square has equal positive charges at three of its corners, as shown in the sketch below.
