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17.4 Electric Circuits CIRCUIT: closed pathway where the start and end points are the same, complete path for electric charge to flow, includes load wire energy source SWITCH: opens and closes circuit In a closed circuit energy flows and in an open circuit energy doesn’t flow Any electrical device is called a “load” SERIES CIRCUIT: all parts connected in a single loop, as you add loads the resistance increases so the current decreases for each item, if there is a break in the circuit no energy flows PARALLEL CIRCUIT: loads are connected side by side, all loads receive the same voltage, if there is a break energy continues to flow Standard voltage in a US home is 120 volts Broken wires or water can cause a short circuit CIRCUIT BREAKER is a switch that automatically opens if the current is too high SAFETY around electricity includes materials in good condition, not overloading circuits, keeping electricity away from water and not putting anything into outlets