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Question

A device that opens and closes a circuit is a __________.


A
electrical current
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B
switch
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C
volt
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D
conductor
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Solution

The correct option is B switch
An open circuit is one where the continuity has been broken by an interruption in the path for electrons to flow. A closed circuit is one that is complete, with good continuity throughout. A device designed to open or close a circuit under controlled conditions is called a switch.

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