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IntroductionThis purpose of this experiment on electrical circuits is to expose us to things that go into circuits such as Voltage, resistance, series circuits, parallel circuits, and Ohms law. Our group had a week to construct and test the different circuits on the breadboard provided. The types of circuits that go into this experiment are the Simple Circuit, Series Circuit,Parallel Circuit, and the Combination circuit. Electrical circuits consist of the following components: an energy source to provide voltage, conductors to allow current travel, insulators to limit current travel and a load.MaterialsEngineering NotebookPC with Internet accessCalculatorPencilProcedureProcedureThis activity will provide you with an introduction to voltage, current, resistance, series circuits, parallel circuits, and Ohms Law. Your team (2 members) will construct circuits using an online electricity simulator. You will use a virtual multi meter to measure properties within the circuit. Combination Circuit13.Create the circuit shown below. The bulb #1 should still be on, the current meter should have the same measurement as in step 8, and the bulb #2 and #3 should be off. Close the switch button and note what happens to the first light. Refer to the image below and record the new current measurement in the space provided below the image. Voltage across battery ______9___V Voltage across bulb #1 ___8.998______V Voltage across bulb #2 ____4.49___V Voltage across bulb #3 _____4.49__V Current at bulb #1 ___________.9___A Current at bulb #2 and #3 ______.45________A Total current ________1.35______AParallel Circuit10.Create the circuit shown below with the switch open. Confirm that: bulb 1 is on and bulb 2 is off. Close the switch and record the following data. What happened to brightness of the first bulb? ____Brightened__________________________ Which bulb is brighter? ________________They are the same____________ Current at bulb #1 _____________9_A Current at bulb #2 ___________9___ACurrent total __________1.8_____A 11.Add a voltmeter to the circuit. Record the voltages across each light and the output source in the space provided below. Bulb #1 __________8.998______V Bulb #2 _________4.499________V Output at the battery ________9________V 12.Calculate total resistance for the circuit (show all work): Formula: R= VISubstitute and solve: RT______10____ Ω Series Circuit7. Use the image below to create a series circuit. Current ___________0___A Voltage across battery _____0____V Voltage across bulb #1 ____0_____V Voltage across bulb #2 _____0__V 8. Close the switch. Record the new readings for the circuit. Current __________.11____A Voltage across battery _____9____V Voltage across bulb #1 ______1.06___V Voltage across bulb #2 _____7.941__V Add an ammeter between the bulbs and record the current. Current between bulbs __________.11____A 9. Use the voltage (V) and current that you have already determined for this series circuit current (I) to determine the resistance of the bulbs in series. Show your work and include units. Formula: Substitute values: 1.06.11Solve: Resistance = ____81.79___________ΩConclusion1. Explain the primary difference between a series and a parallel circuit?A series circuit only has one path for the current to travel through but a parallel circuit has multiple paths for the current to travel through.2. Explain the difference between the voltage output at the battery and the voltage across each bulb in the series circuit?The voltage output at the battery is going to be 100% of whatever the batterys voltage is. The voltage across each bulb in a series circuit will be the same across each bulb, but the current flow will be affected based on any ohms that may be present.3. In a series circuit, explain the relationship between the current at the battery and each bulb in the circuit?The relationship between the current at the battery and each bulb in the circuit is the battery helps gives off the voltage to light up the two bulbs. The battery has little voltage so one of the bulbs is dim and the other doesnt light up4. Explain the relationship between voltage at the battery and voltage across each bulb in a parallel circuit?Voltage at the battery is stronger than the 2nd bulbs current5. Explain the relationship between current at the battery and current through each bulb in the parallel circuit?Current at the battery will total the currents of all the bulbs that are switched on. 6. For the combination circuit, explain the relationship between the voltage output at the interface and the voltage across the two light bulbs?Bulb 2 and 3 both share a voltage but because of bulb 1 resistance, The two bulbs get less current. Since bulb 1 is by itself it gets more voltage from the battery. The two bulbs both are close to each other so it is hard to get a voltage. 7. For the combination circuit, explain the relationship between the current output at the battery and the current through each bulb in the parallel circuit? Bulb 2 and 3 get less current because of the resistance.
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