For this science project (the Electric House Project) we had to build a creative house with a minimum of four working electric circuits. We had to have one series circuit with a minimum of two lights, a parallel circuit with a minimum of two lights, a complex circuit with a minimum of three lights and lastly a circuit of our choice. For my classmate and I’s house we decided to build a six-level building with six circuits(one for each floor). We decided to name build our own version of Scranton (after the tv show The Office), so Scranton 2.0. Our first level is the reception, in which we installed our complex circuit with four lights. Then for the next three levels( levels 2-4) are the offices where we installed three series circuits each with three lights. Then a conference room with a parallel circuit containing three lights and finally, the boss’s office with the circuit of our choice. We chose to do a parallel circuit with two lights.
Our wiring: 6th level: Extra circuit (parallel circuit) 5th level: Parallel circuit with three lights 2-4th level: Series circuit with three lights 1st level: Complex circuit with four lights
Series Circuit (for floors 2-4)
Parallel Circuit with three lights (5th floor)
Complex circuit (1st floor)
Extra circuit: Parallel with two lights(6th floor)
1. You have three light bulbs. All have the same intensity when lit. Explain how you can prove to a classmate that they are connected in series by unscrewing one light bulb. Support your answer.
In a series circuit, all the components are connected in a single pathway. So, the electrons only have on path to follow. By unscrewing one light bulb, all the other lights would also go out because they are all connected on the same path. Since in a circuit the electrons have to go through a “loop” back to the source, if the circuit is cut off the electrons can’t go back to the battery. For example, if you have fairly lights and one of them is faulty and all the other ones go out as well, that means that it’s a series circuit because the electrons follow one path and when it’s interrupted they electrons cannot go through the circuit. Therefore, unscrewing one light bulb makes all the others go out.
2. You have three light bulbs. All have the same intensity when lit. Explain how you can prove to a classmate that they are connected in parallel by unscrewing one light bulb.
In a parallel circuit electrons follow multiple pathways. So, when a light bulb is unscrewed and shuts off, the other light bulbs still work, because the electrons have more than one pathway. The light bulbs don’t rely on each other to function because of the multiple pathways. When the electrons reach the unscrewed light bulb they just go through another pathway to get back to the source.
3. You have three light bulbs. Two are connected in a parallel. This parallel combination is connected in series with the third light bulb. Describe the relative intensity of each bulb. Support your answer.
In a parallel circuit the electrons are split into multiple pathways to get back to their source(battery), so the intensity is dimmer in the parallel lights since they would need a stronger current to get back to their source with a strong light because there would be half the amount of electrons flowing through the wires. But in a series, the electrons only follow one pathway so they don’t split so the intensity is stronger and equal throughout the series.
4. In question number three, describe the relative intensities of the two remaining lit bulbs, if one of the bulbs in parallel was unscrewed. Support your answer.
If one of the light bulbs that is in a parallel is unscrewed, the other parallel will be in series with the other light bulb. Therefore, all the electrons will flow through the remaining lights and the relative intensity of those bulbs will be equal. The electrons will only have one pathway to follow so, the lights will be brighter and the electrons won’t split and just follow a “loop” to complete the circuit.