PH 106 Midterm: ph106_F08_Exam1_sample_SOLN
Document Summary
If all the charges were equal, an equilibrium arrangement would obviously be a symmetrical one with the particles spaced 120 apart around the circle. Suppose two of the charges have equal charge q, and the equilibrium arrangement is such that these two charges are 90 apart rather than 120 . For reference, let us say the charges are along a horizontal line, with the positive charge on the right and the negative charge on the left. Q2: in the gure above, a point charge 1q+ is at the center of an imaginary spherical gaussian surface and another point charge 2q+ is outside of the gaussian surface. Point p is on the surface of the sphere. O d: a slab of insulating material, in nite in two of its three dimensions, has a uniform positive charge density , shown at left.
