Plasma (physics) potential in the space between charged particles, independent of how it can be measured, is called the "plasma potential", or the "space potential". If an electrode is inserted into a plasma, its potential will generally lie considerably below the plasma potential due to what is termed a Debye sheath. The good electrical conductivity of plasmas makes their electric fields very small. This 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 (formula_6), but on the scale of the Debye length
Negative and positive rights Negative and positive rights Negative and positive rights are rights that oblige either action ("positive rights") or inaction ("negative rights"). These obligations may be of either a legal or moral character. The notion of positive and negative rights may also be applied to liberty rights. To take an example involving two parties in a court of law: Adrian has a "negative right to x" against Clay if and only if Clay is "prohibited" from acting upon Adrian in some way regarding "x". In contrast, Adrian has a "positive right to x" against Clay if and only if Clay is obliged