What term describes the property of having two opposites, such as a positive and negative pole of an electric current?

The term that describes the property of having two opposites, such as a positive and negative pole of an electric current, is polarity. In the context of electricity, polarity is crucial because it defines the direction of current flow. With electric currents, the positive pole indicates where the current originates, and the negative pole indicates where the current is directed. Understanding polarity is essential in various applications, including skincare devices like galvanic treatments, where the polarity of the electrodes can affect the treatment's effectiveness.

Voltage refers to the potential difference that drives the current, while resistance measures how much a material opposes that current flow. Conductivity describes how well a material can conduct electricity but does not specifically address the concept of opposites in electrical terms.