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What is the primary function of a switch in an electrical circuit? A. To increase the voltage in the circuit B. To regulate current flow by increasing resistance C. To open or close the circuit, allowing or stopping current flow D. To convert AC to DC C. To open or close the circuit, allowing or stopping current flow Which type of switch is commonly used in household light circuits? A. Toggle switch B. Push-button switch C. Rotary switch D. Knife switch A. Toggle switch What happens ...