Lab3_Current-1

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University of Memphis *

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7386

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Medicine

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Dec 6, 2023

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pdf

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3

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College Physics -II (PHY205L) Baptist Health Science University Lab 3 : PhET simulation: “Circuit Design ” Objectives : Students will use simulations to build and then compare and contrast series and parallel circuits. To access the website, navigate your browser to: https://phet.colorado.edu/en/simulation/circuit-construction-kit-dc-virtual-lab Instructions on starting up the simulations: 1. Click on either the Download button located below the simulation picture or on the HTML5 logo located on the lower right corner of the simulation picture. 2. Chose Open when the dialog box comes up. Make sure to click allow Java to run if the permissions box pops up. It should load after this. Getting Familiar with the lab: You now have the raw material to create a circuit. Take a moment to look over the site and find all the different materials. To build a circuit you will need several wires, a light bulb, a voltage source, a voltmeter, and a non – contact ammeter. Play with it to see how to grab and manipulate these tools. Click the reset button. (circular orange button in the lower right corner) Lab Procedure and Questions Part 1- Series Circuits 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 bulb also has TWO circles. Your circuit is complete and working when the light comes on and the blue dots begin moving. Question 1. What do the moving blue dots represent? ______________________________________________ Use the tools at the side to get a voltmeter and a Non-contact ammeter. Put the voltmeter near the battery and place the red tab at one end and the black at the other. Questions 2. What is the voltage? __________ Volts Place the ammeter crosshairs over the moving blue dots. the current flowing through . · 9
College Physics -II (PHY205L) Baptist Health Science University 3. What is the reading? __________ Amps 4. What does this tell us about the circuit? _________________________________________________ Use the left button to adjust with the resistance and voltage of the battery. Questions 5. How does changing the voltage affect the readings on the voltmeter and ammeter? 6. How does changing the resistance affect the readings on the voltmeter and the ammeter? 7. 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. Part 2: Parallel Circuits Parallel circuits provide more than one path for electrons to move. Using the simulator tool create a (working) parallel circuit that includes 10 wires, 2 light bulbs and 1 voltage source . Use the voltmeter and non-contact ammeter to measure electron flow and push. Questions 8. What is the Voltage:_______ 9. How does this compare with your observations in the series circuit? Is this surprising? WHY or WHY NOT?
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