What is meant by an open circuit? Why does electric current not pass in this case?

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An open circuit means a circuit which is not complete or is broken (loop). So, the current does not flow in an open circuit.

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Open circuit:-

The circuit where the current does not have a closed path to complete the circuit is called an open circuit.

Example:-When we switch off bulb it forms a open circuit, the bulb is turned off.
 

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A torch is an example of open circuit.

In this case battery and bulb are not connected.

These are connected by using the switch

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In simple language open switch means the switch is of and if we say that switch is closed then the switch is on . if the switch is open the electric current does not pass because current wants continous path to flow.

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An open circuit is a circuit which is incomplete and is in off position .

The electric current does not pass in this case because the circuit is incomplete and needs a complete path instead to do so .

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An open circuit is a circuit having a break in it like when a wire may be cut. Electric current cant flow because it cant cross the break in the wire as the wire is not in contact. 

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open circuit is  circuit in which the switch is in off position.current does not pass in this case because the circuit is broken. 

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an open circuit  happens when we OFF the switch and current does not flow,because the switch will be a conductor acting like a bridge,so when a bridge is broking nothing can pass through it,same like this current cannot pass.    

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