In physics and electrical engineering, a aqueduct is a actual which contains adaptable electric charges. In brownish conductors such as chestnut or aluminum, the adaptable answerable particles are electrons (see electrical conduction). Positive accuse may aswell be mobile, such as the cationic electrolyte(s) of a battery, or the adaptable protons of the proton aqueduct of a ammunition cell. In accepted use, the appellation "conductor" is changeable with "wire." Insulators are non-conducting abstracts with few adaptable accuse and which abutment alone bush electric currents.