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Circuits (16.3) Notes What are An electric circuit is a ________________ through which charges can be conducted. In other words there is a Circuits? __________________-loop path for electrons to follow. This conducting path is called a _________________ _________________. Without a complete path, there is no charge flow and therefore no current. This is called an ______________ ________________. ____________________ are used to open and close circuits. A diagram that depicts the construction of an electrical circuit or apparatus is called a ____________________ ____________________. Complete the chart below by drawing the symbols for each electrical component: SCHEMATIC DIAGRAM SYMBOLS Component Wire or other conductor Resistor Bulb or lamp Battery or other voltage source Open Switch Closed switch Schematic Symbol When appliances or other devices are connected in a __________________ circuit, they form a single pathway Series and for charges or current to flow. Parallel Circuits Because there is only one ______________for a charge to follow when connected in series, the current in each device in the circuit is the ____________________. The ______________________ may be different; therefore, the voltage across each device in a series can also be different. Series: Sketch a series circuit here: Parallel circuits have _________________ paths for current. When devices are connected in __________________, the voltage across each device is the ______________. The __________________ in each device does not have to be the same. Instead the sum of all the devices equals the ____________ current. A _________________ in any one path in a parallel circuit does not interrupt the flow of electric charge in the other paths. Parallel: Sketch a parallel circuit here: Electric Electrical energy is the energy produced as a result of ____________________ particles because of their Power and positions. Electrical Energy When an electrical charge moves, work is done. The rate at which electrical work is done is called electrical ________________. It is the product of total current in (I) and voltage (V) across the circuit. P = IV Power companies charge for _______________ used in homes, not power. The unit these companies use to track usage is the _________________-______________. Fuses and Too many appliances or short circuits can cause the the overall _____________________ of a circuit to be Circuit lowered. This allows wires to carry an unsafe amount of current. High curretns in ______________________ Breakers circuits can cause ______________. To prevent overloading circuits, _____________ are sonnected in series along a supply path. If current becomes too large, the fuse will ______________ and the circuit will open. Circuit breakers act as a ____________________ that opens when current becomes too large.