EET-117- 2023- Lab 6 Muhammand & Damian (1)

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Apr 3, 2024

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1 | P a g e Centennial College ELECTRICAL ENGINEERING TECHNICIAN & TECHNOLOGY Course: EET-117 Name Muhammad & Damian Student Number 301362775 & 301346385 Date 2023/10/29 Lab #6 SERIES CIRCUITS Based on Experiments in Basic Circuits by David Buchla Objectives: 1 Use Ohm's law to find the current and voltages in a series circuit. 2. Apply Kirchhoff's voltage law to a series circuit. Required Instruments and Components: Power supply DMM (Digital Multi-meter) Breadboard Alligator test leads (from the EET-117 labkit) Resistors: 330 Ω, 1.0 kΩ, 1.5 kΩ, 2.2 kΩ (from the EET-117 labkit)

2 | P a g e Procedure 1. Obtain the resistors listed in Table 1 . Measure each resistor and record the measured value in Table 1. Compute the total resistance for a series connection by adding the measured values. Enter the computed total re s istance in Table 1 in the column for the listed value. Reminder of steps to measure resistance using lab DMM (reference to the manual): 1. Connect the device under test to the instrument, as shown: 2. Select a resistance measurement function: • Press Ω2 to select 2-wire ohms. 2. Connect the resistors in series, as illustrated in Figure 3. Measure the total resistance of the series connection and verify that it agrees with your computed value . Enter your measured value in Table 1. Fig. 3 Table 1. Measured and computed resistance values (use up to 3 significant digits, and metric prefixes) Component Listed Value Measured Value Marks R 1 1.0 kΩ 0.98 kΩ /1 R 2 1.5 kΩ 1.48 kΩ /1 R 3 2.2 kΩ 2.16 kΩ /1 R 4 330 Ω 0.32 kΩ /1 R T 5.03 kΩ 4.96 kΩ /1 Total /5

3 | P a g e 3. C o mplete the circuit shown in Figure 4, making certa i n that th e ammeter is connected in series ; otherwise damage to the meter may result . B e fo re a p p l ying p o wer, ask your professor to check the circuit . C o mpute the current in the circuit by su b stituting the source voltage and the total resistance into Ohm's law; that is: Fig. 4 Record the computed current in Table 2 . Apply power, and confirm that your computed current is within experimental uncertainty of the measured current . Record the measured current in Table 2. 4. In a series circuit, the same current flows through all components . We can use the total current from step 3 and Ohm's law to compute the voltage drop across each resistor . Compute V AB by multiplying the total current by the resistance between A and B . Record the results as the computed voltag e in Table 2. 5. Repeat step 4 for the other voltages listed in Table 2. 6. Measure and record each of the voltages listed in Table 2 . Table 2. Measured and computed values (use up to 3 significant digits, and metric prefixes) Computed Value Measured Value Marks I T 2.98mA 3.02mA /5 V AB 2.98V 2.99V /5 V BC 4.47V 4.51V /5 V CD 6.556V 6.57V /5 V DE 0.983V 0.99V /5 Total /25

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4 | P a g e 7. Using the source voltage (+ 15 V) and the measured voltage drops listed in Table 2, prove that the algebraic sum of the voltage rises and drops within a closed loop is zero (within experimental uncertainty) . Do this by applying the rules listed in the Summary of The o ry. Write the algebraic sum of the voltages on the first line of Table 3. The polarities of voltages are shown on Figure 4. 8. Repeat step 7 by starting at a different point in the circuit and traversing the circuit in the opposite direction. Write the algebraic sum of the voltages on the second line of Table 3. 9. Open the circuit at point B. Measure the voltage across the open circuit. Call this voltage V open . Prove that Kirchhoff's voltage law is still valid for the open circuit. Write the algebraic sum of the voltages on the third line of Table 3. Table 3. Step Number Kirchhoff’s Voltage Law (Write 2 equations: A. Using Symbols , and B. Measured Values) Marks 7 A. R 2 I + R 3 I + R 4 I - V + R 1 I=0 B. 1.48kΩ*3.02mA + 2.16KΩ*3.02mA + 0.32kΩ*3.02mA – 15V + 0.98kΩ*3.02mA = 0 /5 /5 8 A. R 1 I +R 2 I + R 3 I + R 4 I – V =0 B. 0.98kΩ*3.02mA + 1.48kΩ*3.02mA + 2.16KΩ*3.02mA+ 0.32kΩ*3.02mA – 15V = 0 /5 /5 9 A. V - V OPEN =0 B.15-15=0 /5 /5 Total /30

5 | P a g e Multisim Practice Using Multisim connect and simulate the circuit shown in Figure 5 to measure total current and voltages between different points of the circuit. Fig.5 Record Computed and Measured Values in Table 4

6 | P a g e Table 4. Measured and computed values (use up to 3 significant digits, and metric prefixes) Computed Values Measured Values Marks I T = 665µA 682µA /2 V AB V AB = V 1 = 220mV 220mV /2 V BC V BC = V 2 = 665mV 665mV /2 V CD V CD = V 3 = 1.46V 1.46V /2 V DE V DE = V 4 = 6.65V 6.65V /2 Subtotal /10 Save your File as “EET-117 Lab 6 Fig.5” in the Multisim format and submit it with your lab . Marks: /20

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7 | P a g e Conclusions. The conclusion summarizes the important points of the laboratory work. You must analyze the examples to add emphasis to significant points. You must also include features and/or things you have done /benefits of a particular procedure, instrument, component, or circuit directly related to the experiment . In this lab, our main objective was to grasp the principles of series circuits, primarily Ohm's law and Kirchhoff's voltage law. By creating a series circuit with various resistors and meticulously measuring and calculating values, we successfully validated these fundamental laws. Our close agreement between computed and measured values for resistance, current, and voltage reinforced the accuracy of our experimental methods. Ohm's law was confirmed as we calculated and measured current, and we observed that voltage drops were directly proportional to resistance. Marks: / 20 Rubric-Grading Criteria Max. Marks Punctuality 10 Lab Safety 20 Procedure 55 Multisim Practice 30 Conclusion 20 Neatness, Spelling, Grammar, and Sentence Structure 10 Total: /145