Electrical resistivity and conductivity results in the important concept of "quasineutrality", which says the density of negative charges is approximately equal to the density of positive charges over large volumes of the plasma ("n" = <Z>"n"), but on the scale of the Debye length there can be charge imbalance. In the special case that "double layers" are formed, the charge separation can extend some tens of Debye lengths. The magnitude of the potentials and electric fields must be determined by means other than simply finding the net charge density. A common example is to assume that the electrons satisfy the Boltzmann relation: Differentiating this
Negative and positive rights Under the theory of positive and negative rights, a negative right is a right "not to be" subjected to an action of another person or group—a government, for example—usually in the form of abuse or coercion. As such, negative rights exist unless someone acts to "negate" them. A positive right is a right "to be" subjected to an action of another person or group. In other words, for a positive right to be exercised, someone else's actions must be "added" to the equation. In theory, a negative right forbids others from acting against the right holder, while a positive right