Question

which electric element should be used so as to open the closed electric circuit

Answer 1

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An electrical circuit is a continuous conductive path usually connecting a power source to a load of some sort, like a light or motor. If you break the circuit anywhere it becomes an open circuit. A simple example would be a battery sitting on the table, not connected to anything, the two terminals would be an open circuit. If you connect a light between the terminals you create a closed circuit.

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Answer 2

Answer:

A Simple example would be a battery sitting on the table, not connected to anything, the two terminals would be an open circuit. If you connect a light between the terminals you create a closed circuit