otential.—. To determine the character of a fieldit is necessary to knoiv not only the intensity at a givenpoint, but also how the intensity varies in the neighbor-hood of that point. For instance, at two given pointsthe intensity may be just the same, at one, however, dueto a small near charge, at… … Fig. 12. a charge q at a distance r. As seen in the figure, let therebe one line per square centimeter at A, then at any pointin A the intensity is unity. Let also A be a square centi-meter perpendicular to the lines emanating from a chargeof 25 q at the distance 5 r. Now since the force betweentwo…
Electronics · Electricity
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