Open circuit may refer to: * Open circuit breathing apparatus, any type of breathing apparatus where the exhaled gas is discharged to the surroundings without recycling any of it ** Open-circuit scuba, a type of Scuba-diving equipment where the user breathes from the set and then exhales to the surroundings without recycling the exhaled breathing gas ** Open circuit surface-supplied diving equipment, a type of surface-supplied diving equipment where the user breathes from the supplied gas and exhales to the surroundings without recycling the exhaled gas * Open-circuit test, a method used in electrical engineering to determine the impedance in the excitation branch of a real transformer *

Open-circuit voltage Open-circuit voltage (abbreviated as OCV or VOC) is the voltage, difference of electrical potential between two Terminal (electronics), terminals of an electronic device when disconnected from any Electric Circuit, circuit. There is no External ...

, the difference of electrical potential between two terminals of a device when there is no external load connected *An open electrical circuit is an electrical network that lacks a complete path between the terminals of its power source

See also