Voltage power and current, where 1 volt = 1 watt (of power) per 1 ampere (of current). This definition is equivalent to the more commonly used 'joules per coulomb'. Voltage or electric potential difference is denoted symbolically by , but more often simply as "V", for instance in the context of Ohm's or Kirchhoff's circuit laws. Electric potential differences between points can be caused by electric charge, by electric current through a magnetic field, by time-varying magnetic fields, or some combination of these three. A voltmeter can be used to measure the voltage (or potential difference) between two points in a
USS Ampere equipment was transferred to "USS Surfbird", a minesweeping vessel which was redesignated a degaussing ship on 15 June 1957. She remained in reserve in the Far East until the summer of 1961, when the decision was made to dispose of her. Her name was struck from the Naval Register on 1 July 1961, and she was sold on 21 June 1962, to the Philippine President Lines of Manila. Her final disposition is unknown. USS Ampere USS "Ampere" (PCE-919/AM-359/YDG-11/ADG-11) was originally planned as a for the United States Navy, "PCE-919", and laid down as an , named "Drake", for the male