Open circuit

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An open circuit has infinite resistance to electrical charge. Stated another way, an open circuit is a circuit that does not have a connection between the two sides of the battery. As a result, electric current does not flow.

An open circuit is contrasted with a 'closed' circuit, in which current does flow through the connection.[1]


  1. Bird, John, Electrical and Electronic Principles and Technology (3rd edition). Newnes, 2007