Its means there is no continuity between point Ato point B. Ex. A light switch : When the switch is off it opens the circuit and electricity does not get to the light, when the switch is on the circuit is closed and the light will turn on.
An electric circuit is opened whenever a part of it is not connected to anything.
A circuit breaker is an overcurrent device that can be reset after it has opened.
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When a switch is closed the path through the circuit is continuous.
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an opened circuit is considered to be possessed with an infinite resistance which totally opposes the flow of current in the circuit and ultimately makes the functioning of elements in the electric circuit subtle
open circuit is when there is a break in your closed loop circuit (example: loose connection) and no current is flowing
it prevents electricity to flow. i hope that is right
Electricity does not flow in an open circut
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If you mean by activity, working on an electrical circuit, then it is for safety reasons that a switch is opened. Most companies now use a proper lock out procedure so that everyone is aware that the circuit has been locked out. If more than one person is working on the circuit each person is required to have their own personal lock on the open switch.
At a switch, the electric current can be opened (turned off) or closed (turned on) depending on the position of the switch. When the switch is opened, the circuit is broken, and no current flows. When the switch is closed, the circuit is complete, and current can flow through the circuit.