Series And Parallel Circuits Computer Lab - Weebly

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Series and Parallel Circuits Basics1Name:PerDateSymbols for circuit diagramsDirections:1.Log on to your computer2.Go to the following cuit-construction-kit-dcClick the button that says “Play with sims ”3.Click on the application that says Circuit Construction Kit (DCOnly) It should be the first box.4.Click “Run now.”5.You now have the raw material to create a circuit. Take amoment to look over the site and find all the different materials. Tobuild a circuit you will need several wires, a light bulb, a voltagesource, a voltmeter, and a non – contact ammeter. Play with it to see how to grab and manipulatethese tools.6.Click the reset button.Series Circuits1) Build a simple series circuit that consists of 6 pieces of wire, 1 light bulb, and 1 battery (voltage source).In order to complete the circuit, the red circles at the end of each must overlap. Please note that the light bulbalso has TWO circles. Your circuit is complete and working when the light comes on and the blue dots beginmoving. Call me over to sign your paper once you believe you have completed this task.a. Draw a picture of your circuit here.Call me over to sign your paper once you believe you have completed this task.b. What do you think that the moving blue dots represent?

Series and Parallel Circuits Basics22) Use the tools at the side to get a voltmeter and a Non-contact ammeter. Put the voltmeter near the batteryand place the red probe at one end and the black probe at the other.a. What is the voltage?b. Now switch the ends of the battery that the red and black probes touch thebattery.c. What is the new voltage?d. In electronics, many things are color coded, meaning the color represents aspecific condition of the wire being connected. Since voltage is a measurement of the power(driving force) of the electrons, in which voltage reading makes sense?Electrons collect on the negative terminal of the battery. If you connect a wire between the negative andpositive terminals, the electrons will flow from the negative to the positive terminal as fast as they can (andwear out the battery very quickly -- this also tends to be dangerous, especially with large batteries, so it is notsomething you want to be doing). Normally, you connect some type of load to the battery using the wire.The load might be something like a light bulb, a motor or an electronic circuit like a radio.e. From what you have already read and observed, does the red color represent the Positive sideor the negative side? Explain your answer.3) Place the ammeter crosshairs over the moving blue dots. What is the reading?a. What does this tell us about the circuit?Amperage is the amount of electrical current flowing through a circuit. It is measured in amperes,abbreviated amps. In practical terms, the ampere is a measure of the amount of electric charge passing apoint per unit time. Around 6.241 1018 electrons, or one coulomb, passing a given point each secondconstitutes one ampere.4) Use the right click button to play with the resistance and voltage of the battery. Make observations onhow changing each of these two settings in the battery affects the readings on the voltmeter and ammeter.Record your observations below. Be sure to record the changes you made and then the effects.

Series and Parallel Circuits Basics35) Click the advanced tab and alter the resistivity of the wire. Record your observations.Click the reset button to begin working on a parallel circuit.Parallel Circuits6) Parallel circuits provide more than one path for electrons to move. Sketch a parallel circuit that includes10 wires, 2 light bulbs and 1 voltage source.Call me over to sign your paper once you believe you have completed this task.7) Create the above parallel circuit using the simulator tool. The blue dots will be moving and both lightswill be on once the circuit is complete.8) Use the voltmeter and non-contact ammeter to measure electron flow and push.a. Voltage:Ammeter:b. How does this compare with your observations in the series circuit? Is this surprising? WHYor WHY NOT?c. Alter resistance of both resistors and voltage and record your observations below.d. Now right click on one of the wires connected to a light bulb. Remove the wire and recordyour observations.

Series and Parallel Circuits Basics4e. Does this affect the voltage, amperes, or visually change the appearance of the light bulb?f. Replace the wire. Now remove one of the wires touching the voltage source. What happened?Click the reset button.Complex CircuitsWhen you combine together series circuits and parallel circuits, youcreate some pathways that allow the electrons to be able to travel inmore than one wire.9) Create the circuit as shown to the right and change the voltageof the battery to 30 V. Initially set the resistance to 10 ohms(the greek leter capital omega (Ω) is the symbol used to labelohms). Now using your voltmeter and ammeter, measure thevoltage and amperage of each resistor. Then using Ohm’s law,(voltage (V) amperage (I) times resistance (R) , calculate the resistance for each resistor or pair of resistorsin each circuit.10) After you fill I the tables below, answer the following questions:a. What effect does it make to have R2 & R3 in parallel andnot series?b. How could you replace R2 and R3 with a single resistor sothat the Voltage, amperage and resistance at R1 does notchange?

Series and Parallel Circuits Basics5Voltage in e(A)(Ω)CalculatedresistanceR V/IR1R2R3R4R5Before the parallelcircuitAfter the parallelcircuitTotal of R1,Parallelcircuit, R4 & R5Now change each of the resistors so they each have a different value and repeat the measurements ce(Ω)R1R2R3R4R5Before the parallelcircuitAfter the parallelcircuitTotal of R1,Parallelcircuit, R4 & R5Amperage(A)CalculatedresistanceR V/I

Series and Parallel Circuits Basics 3 5) Click the advanced tab and alter the resistivity of the wire. Record your observations. Click the reset button to begin working on a parallel circuit. Parallel Circuits 6) Parallel circuits provide more than one path for electrons to move. Sketch a parallel circuit that includes

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