PHYS 142 Lecture Notes - Lecture 3: Surface Charge, Electric Dipole Moment, Electric Field
12 Mar 2015
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Phys 142: electromagnetism and optics - lecture 3: electric field models part 1. The net electric field enet at each point in space is a superposition of the electric fields due to each individual charge. Two equal but opposite charges separated by a small distance form an electric dipole. The electric field at a point on the axis of a dipole is: e= 1. 4 o dipole) where r is the distance measured from the center of the dipole (half s) The electric field in the plane that bisects and is perpendicular to the dipole is: This field is opposite to the dipole direction, and it is only half the strength (on the axis of the. 2 p r3 of the on-axis field at the same distance. The linear charge density of an object of length l and charge q is defined as: Linear charge density, which has units of c/m, is the amount of charge per meter of length.
