However, in electronics, the term "resistance" is routinely applied to the static resistance at the ports of active circuits such as amplifiers, which can be negative because they have a source of electric power; the DC supply power applied to other ports.
However, in electronics, the term "resistance" is routinely applied to the static resistance at the ports of active circuits such as amplifiers. These can have true negative static resistance because they have a source of electric power; the DC supply power applied to other ports.