  Theories and Laws

Gauss's Law

Gauss´s law allows one to solve some problems involving charge distributions on conductors, and to calculate the electric field of several simple charge configurations. It is a mathematically equivalent form of Coulomb´s law. Gauss´s law relates the flux F of electric field that "leaves" through a closed surface, to the total charge interior to that surface. The formula is F = (E)(A)(cos q) = 4 p k Q where E is the electric field, A is the surface area, and Q is the charge enclosed by the surface. The angle q is the angle between E and the normal to the surface. In all of our applications of Gauss´s law, the electric field will be perpendicular to the surface, so q will be equal to 0 and therefore the factor cos q will simply be equal to 1. We have to live with a perverse tradition that the constant k is frequently written as; where e0 = 1/(4 p k) = S.35e-12. So Gauss´s law also may be seen written in the form Keywords : Gauss, Law, Electronic, Theory
Writer : delon  |
15 Dec 2005 Thr
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