The flow of electric charges along a closed path is known as, electric wire, light energy, electric current, sound energy, The source of electricity in an electric circuit is , metal wire, switch, battery, .........is resposible for opening and closing the electric circuit., Battery, Switch, Light bulb, When the switch is opened (turnrd off) the circuit, closes, opens, doesn't change, When the switch is closed , the circuit, closes, opens, doesn't change, ......is an automatic switch, A wall switch, Thermostat switch, ..........is an electric conductor, Plastic, Copper.

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