Open circuit

• Open-circuit voltage
  Open-circuit voltage
  
  Open-circuit voltage is the potential difference between two terminals of a device when there is no External_electric_load connected, i.e. the electrical network is broken or open....
  , the difference of electrical potential between two terminals of a device when there is no external load connected
• 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 air
• Self-contained breathing apparatus, used in open-circuit SCUBA
• An electrical circuit is an "open circuit" if it lacks a complete path between the positive and negative terminals of its power source. Open circuits have infinite electrical resistance
  Electrical resistance
  
  The electrical resistance of an object is a measure of its opposition to the passage of a steady electrical current. An object of uniform cross section will have a resistance proportional to its length and inversely proportional to its cross-sectional area, and proportional to the resistivity of the material....
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See also

• Closed-circuit
  Closed-circuit
  
  closed-circuit can refer to:*closed-circuit television*rebreather breathing sets...
  
• Short circuit
  Short circuit
  
  A short circuit in an electrical circuit that allows a Electric current along a different path from the one intended.The electrical opposite of a short circuit is an "open circuit", which is an infinite resistance between two nodes....
  
• Open system
  Open system
  
  Open system may refer to:*Open system , one of a class of computers and associated software that provides some combination of interoperability, portability and open software standards, particularly Unix and Unix-like systems...