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Open-circuit voltage (abbreviated as OCV or VOC ) is the difference of electrical potential between two terminals of a device when disconnected from any circuit. There is no external load connected. No external electric current flows between the terminals. It is sometimes given the symbol Voc. In network analysis this voltage is also known as the Thévenin voltage.
Open Circuit Potential is important since the metal with the low open potential will dissolve faster in the electrolyte than the metal with high open circuit potential.
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