PHYSICS 110A Study Guide - Midterm Guide: Electric Field, Test Particle
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Quiz #1: two questions, each has three parts. Each part is worth 20 points, making a total possible score of 120 points. Consider a point charge +q that is suspended above the apex of a wedge-shaped conductor, as shown below. (the star in the drawing is not a charge. Is this amount of work (i) greater, (ii) lesser, or (iii) the same as the work required if the conductor were not there [you need not calculate the work, just argue on prinicple]. q. Consider a thin layer of positive charge in contact with a thin layer of negative charge, as shown in the sketch below: The charge density in the positive layer is and the charge density in the negative layer is - . Assume the layers are perfectly flat and infinite in their lateral dimensions: find the electric field (magnitude and direction) everywhere in space.