Ohm between two points of a conductor when a constant potential difference of one volt, applied to these points, produces in the conductor a current of one ampere, the conductor not being the seat of any electromotive force. in which the following units appear: volt (V), ampere (A), siemens (S), watt (W), second (s), farad (F), joule (J), kilogram (kg), metre (m), and coulomb (C). In many cases the resistance of a conductor in ohms is approximately constant within a certain range of voltages, temperatures, and other parameters. These are called linear resistors. In other cases resistance varies (e.g., thermistors). A
Coefficients of potential Coefficients of potential In electrostatics, the coefficients of potential determine the relationship between the charge and electrostatic potential (electrical potential), which is purely geometric: where "Q" is the surface charge on conductor "i". The coefficients of potential are the coefficients "p". φ should be correctly read as the potential on the i-th conductor, and hence "formula_2" is the p due to charge 1 on conductor 2. or more formally Note that: The physical content of the symmetry is as follows: In general, the coefficients is used when describing system of conductors, such as in the capacitor. Given the electrical potential