Which of the following is an electrical device used to start, stop, or otherwise reconfigure the flow of electricity in a circuit?

A. Fuses
B. Switch
C. Transformer
D. Circuit breaker


A. Incorrect. A fuse is a device used to protect equipment and electrical wiring from overcurrent.
B. Correct. A switch is an electrical device used to start, stop, or otherwise reconfigure the flow of electricity in a circuit.
C. Incorrect. A transformer is an electrical device that takes electricity of one voltage and changes it into another voltage.
D. Incorrect. A circuit breaker is an electrical component that opens a circuit and stops the flow of electricity when the current reaches unsafe levels.

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