Lab 3

.docx

School

The University of Tennessee, Knoxville *

*We aren’t endorsed by this school

Course

222

Subject

Electrical Engineering

Date

Jul 1, 2024

Type

docx

Pages

Uploaded by MateFishMaster1442

Laboratory 2: Circuit Elements Manuelle Toro mtoromar@vols.utk.edu Purpose: For this lab we hope to put to the test our knowledge of circuits, using essential measurement such as Voltage and current, we will work with the different scenarios using the PHET Physics Circuit lab, with the use of simple circuit involving batteries and light bulbs, we will be alter several variables such as voltage and resistance, and see how different configuration affects the input of voltage to the bulbs. Finally, we hope to work with capacitors using a table of data to compare voltage to the time it takes to both charge and discharge. And as such create visible representation that helps us grasp further understanding of this concept. Activity 1 Link to the simulation: https://phet.colorado.edu/en/simulations/circuit- construction-kit-dc Click the Lab icon. Explore the interface!  Components are dragged from the toolbox to make circuits.  To explore the properties of a component, tap it. You can then change many properties and also remove the component. (a) Use one ideal battery (40 V, 0 Ω internal resistance), a light bulb (30 Ω) resistance) and ideal wires (near 0 Ω resistance) to build the circuit shown on the right. Make sure your light bulb lights up. Use the voltmeter to measure the potential difference (ΔV) across the battery. Record only the magnitude of the potential

difference (omit +/- signs). Make a similar potential difference measurement across the bulb and across each length of wire. With the noncontact ammeter, measure the current through the bulb, I Bulb . What to do if you have problems with the animation speed! Fill in "Table A" below.. ΔV Battery ΔV wire A ΔV wire B ΔV Bulb I Bulb 40 0 0 40 1.33  These results are as expected from the little variables controlled, as such given no resistance from the battery or the wire the same voltage coming from the battery should also then be present in the Light bulb Now use two ideal batteries (30 V, 0 Ω internal resistance), three light bulb (30 Ω) resistance) and as many ideal wires as needed to build several different circuits. (b) Use all the components (two batteries, 3 light bulbs) and connect them in such a way as to they produce the most light. (The largest possible current should flow through the bulbs. You can connect the batteries and bulbs in series or in parallel as needed.) Make measurements and fill in "Table B" below. Paste a screenshot of your circuit into your word document. ΔV Battery I Battery ΔV any Bulb I any Bulb 30 2.00 30 1.00

 In this circuit I was able to make it so that the voltage coming grom the battery was also present in all the bulbs and thus they shinned the most. (c) Use all the components (two batteries, 3 light bulbs) and connect them in such a way as to they produce the least amount of light or current, but not zero light or current. (The smallest possible non-zero current should flow through the bulbs.) Make measurements and fill "Table C" below. Paste a screenshot of your circuit into your word document. ΔV Battery I Battery ΔV any Bulb I any Bulb 30 0.33 10 0.33  Given this circuit, I was able to create it so that only 10 V would actually be reaching the bulbs while the battery produced 30 V Set up the circuit shown on the right with three 30 Ω bulbs and one 30 V battery.

(d) Observe the brightness of the bulbs. Make measurements and fill in "Table D" below. ΔV Battery I Battery ΔV Bulb 1 I Bulb 1 ΔV Bulb 2 I Bulb 2 ΔV Bulb 3 I Bulb 3 30 0.67 20 0.67 10 0.33 10 0.33  Overall my observations show the bulb nearest to the battery (bulb 1) itself was the on that received the most power while both bulb 2 and 3 experience the same voltage of 10 V (e) Change the internal resistance of the battery to 2 Ω. What happens? Make measurements and fill in "Table E" below. ΔV Battery I Battery ΔV Bulb 1 I Bulb 1 ΔV Bulb 2 I Bulb 2 ΔV Bulb 3 I Bulb 3 28.72 0.64 19.15 0.64 9.57 0.32 9.57 0.32  Across the board we see the addition of resistance to the battery reduced both the Voltage of battery and bulbs as well as the current being reduced, similarly to the last case both bulb 2 and 3 changed by the same amount as well as their current. Paste Tables A - E into your log and comment on your measurements. Activity 2  Watch this Youtube video clip discussing resistors. As far as a circuit is concerned, any device that converts electrical energy into thermal energy is a resistor. But most devices have a

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version