EET-117-Lab 8- Series Parallel Circuit_W22 (1)

School Of Engineering Technology and Applied Science (SETAS) Advanced Manufacturing and Automation Technology (AMAT) EET 117 – Lab Instructions Section : __________________ Date: Lab #8 GROUP : ___________________ Series-Parallel Circuits Based on Experiments in Basic Circuits by David Buchla Name : _______Kugaraj Ravishnagar_______________________ Name :______________________________ Status and Signature : Objectives: 1. Use the concept of equivalent circuits to simplify series-parallel circuit analysis. 2. Compute the currents and voltages in a series-parallel combination circuit and verify your computation with circuit measurements. Required Instruments and Components: Power supply DMM (Digital Multimeter) Breadboard Alligator test leads (from the EET-117 lab kit) Resistors: 2.2 kΩ, 4.7 kΩ, 5.6 kΩ, 10.0 kΩ (from the EET-117 lab kit)

Procedure 1. Obtain the resistors listed in Table 1. Measure each resistor and record the measured value in the table. A reminder of steps to measure resistance using lab DMM (a reference to the manual): 1. Connect the device under test to the instrument, as shown: 2. Select a resistance measurement function: • Press 2 to select 2-wire ohms. Ω Table 1. Measured resistance values (use 3 significant digits, metric prefixes). Component Listed Value Measured Value Marks R 1 2.2 kΩ 2.11k Ω /1 R 2 4.7 kΩ 3.98k Ω /1 R 3 5.6 kΩ 4.56k Ω /1 R 4 10.0 kΩ 9.23k Ω /1 Total: /4 2. Connect the circuit shown in Figure 1. Notice that the identical current is through R 1 , and R 4 so we know that they are in series. R 2 has both ends connected directly to R 3 so these resistors are in parallel. Fig. 1 3. You can begin solving for the currents and voltages in the circuit by replacing resistors that are either in series or in parallel with an equivalent resistor. In this case, begin by replacing R 2 and R 3 with one equivalent resistor. Label the equivalent resistor R 23 . Draw the equivalent series circuit in the space provided below. Show the value of all components, including R 23.

5. Measure, enter, and compare values in the column beside (Measured in Table 2). Important reminder: don’t forget to disconnect the power supply when measuring the total resistance. When measuring current always connect the ammeter in series and select appropriate function (DCI) with associated connections on DMM (GND & I). Table 2. Measured and computed values (use 3 significant digits, metric prefixes). Computed (Ohm’s Law) Measured Marks V s 12.0 V 14.45k Ω /2 R T 14.76mA 0.864mA /4 I T 0.84mA 1.79V /4 V 1 1.87V 3.0V /4 V 23 2.08V 8.19V /4 V 4 8.9V 9.67V /4 I 2 2.87mA 1.65mA /2 I 3 2.19mA 2.78mA /2 Total: /26 6. The voltage divider rule can be applied directly to the equivalent series circuit to find the voltages across R 1 , R 23 , and R 4 . Find V 1 , V 23 , and V 4 using the voltage divider rule. Tabulate the results in Table 2 and place the results in Table 3. Table 3. Computed values (use 3 significant digits, metric prefixes). COMPUTED (Voltage Divider Formula: show formula and calculations) Marks V 1 V 1 =V 3 x R1 /R r 1.5V /2 V 23 V 23 = V S * R 1/ R T 2.03V /2 V 4 V 4 = V S * R 4 /R T 8.17V /2

Total: /6 7. The current divider rule can be applied to the parallel circuit to find the current in its branches (e.g. I 2 and I 3 ). Tabulate the results from Table 2 and place results in Table 4 showing formulas and calculations. Table 4. Computed values (use 3 significant digits, metric prefixes). COMPUTED (Current Divider Formula: show formula and calculations) Marks I 2 I 2 = I T . R T R 2 2.59mA /2 I 3 I 3 = I T . R T R 3 2.19mA /2 Total: /4 8. Change the circuit to the circuit shown in Figure 2. Draw an equivalent circuit by combining the resistors that are in series. Enter the values of the equivalent resistors on your schematic drawing and in Table 5. Fig. 2

Measured Value I T 9.13V I 12 442uA I 34 271uA V 1 134uA V 2 6.17V V 3 4,21V V 4 7.69V Save your File as “EET-117 Lab 8 Circuits” in the Multisim format and submit it with your lab (you can build 2 circuits in a single project/ file) . Marks: /30

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 . This lab was really hard for me to understand until my professer explain everything to me now I understand everything from this lab so I want to say thank you to my professer for teaching me this lab also he gave me lots of review questions in this lab and the all questions is for our final lab exam in this course after I studied this questions I feel like I can do the lab text very well also I understand that how Voltage Divider Formula Current Divider Formula is important for our lab test and how Voltage Divider Formula is important to electrical because Applying this rule can also solve simple circuits thoroughly  so this lab was kind of big lab with lots of questions and with lots of charts but I understand that the reason why our professer asked us to do this Lab its not just for the marks this lab is really helpful for us to do the lab test as well so I want say thanks to my to my professer for teaching me this lab Marks: / 20 Rubric-Grading Criteria Max. Marks Punctuality 10 Lab Safety 20 Procedure 100 Multisim Practice 30 Conclusion 20 Neatness, Spelling, Grammar, and Sentence Structure 10