PHYSICS 182 Lecture Notes - Lecture 15: Grand Canyon National Park, Field Line, Equipotential
4 May 2017
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Potential due to a group of point charges: superposition: when you have more than one charge, use the first equation, when you have a potential due to a continuous set of charges, use the second equation. Equipotentials: surfaces of constant potential v: e is always perpendicular to the equipotential surfaces, the field lines pierce the equipotentials at right angles, the field is stronger when the lines are closer together. Equipotential surfaces: electric field lines and equipotential surfaces are always mutually perpendicular, the electric potential is the same at every point on an equipotential surface. In electrostatic equilibrium, the surface of a conductor is always an equipotential surface. Moving between equipotentials: a small charge +q is placed as shown in an electric field represented by the equipotential surfaces shown below. Finding e from v: recall: force /potential energy analogues of electric field/potential.
