EXPOSITORY ESSAY FOR THE HOUSE
By: McClain Baxley
A circuit is a closed loop that electrons can travel in. A source of electricity, such as a battery, provides electrical energy in the circuit. Unless the circuit is complete, that is, making a full circle back to the electrical source, no electrons will move. There are three essential parts to a true circuit. These include electrical devices. An electrical device is a device that resists the flow of energy. Another electrical device that a successful circuit must have is a source of electrical energy. An example of this is performed when you plug a radio into a wall socket. The source of energy is the local electric plant. The final part of an electrical circuit is conducting wires. These wires complete the circuit by allowing charges to flow from the energy source to the electric device and back to the energy source.
There are two main types of circuits: series and parallel. There are advantages and disadvantages to each of these. An advantage to the series circuit is that you can add more power sources, like batteries, and increase the force of the output which allows you more power. A disadvantage to a series circuit is the more output devices you add the slower the current becomes. Also, if a bulb or the pathway broke in any way, the other bulbs would go out as well. One of the advantages to the parallel circuit is if one bulb broke the others would continue going. Another advantage is the brightness of the bulbs is greater than the brightness of bulbs in series. A disadvantage of a parallel if you have multiple power sources, the power stays at the same voltage as that of the single power source; increasing the number of output devices does not increase the resistance like it does in series.
You can determine that a circuit is a series circuit after unscrewing one bulb because if it’s a series circuit, the other lights should turn off. If one light burns out or in this case becomes unscrewed, the...
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