ECEN 215 – PRIN OF ELECTRICAL ENGRFall 2018Lab 2: Node Voltages and Equivalent CircuitsECEN 215 – PRIN OF ELECTRICAL ENGRFall 2018 Lab 2: Node Voltages and Equivalent Circuits Submitted by:Student Name UIN: Section # Group #Date Performed: Sept 17th , 2018I. ObjectiveThe purpose of this lab was to better understand how you can use different techniques such asnode voltages and equivalent circuits, in the evaluation of a circuit. II. Procedure1. Using the DMM we located all of the resistors required to build the original circuit.2. With the equipment set up properly, we constructed the circuit and measured VS and IL.3. Using the AD2 we measured VL=Vxy and then calculated the product of IL x RL. 4. We then calculated the percent difference between the measured and calculated values.5. RL was then removed and VOC and ISC was measured.6. The Thevenin equivalent circuit at nodes x and y was calculated using the measured values ofall components. 7. We drew the Thevenin equivalent circuit and used it to calculate IL.8. Using Multisim, we simulated the original circuit using the measured components and foundIL using an ammeter. 9. The percent difference was then calculated between calculated values and simulated valuesand then the percent difference between calculated values and measured values. III. Difficulties1. The only difficulty we encountered was not having the correct resistor for the lab. Thisproblem was rectified by our TA. IV. Results- The nominal and measured values of components in the circuit were as follows: Table 1: Resistor and Voltage ValuesNominal MeasuredR1 = 47  R1 = 49.3 R2 = 47  R2 = 49.3 R3 = 100  R3 = 69.9 R4 = 220  R4 = 217.3 RL = 100  RL = 100.8 VS = 5 V VS = 5.006 V- The measured value of IL was found to be 0.017 A- VL = Vxy was found to be 0.945 V - The product of IL x RL was found to be 1.1736 V- The percent difference of these measured and calculated values was: (1.1736 – 0.945) / (0.945) - 100 = 24.19%- When RL was removed, VOC and ISC was measured to be 1.28 V and 0.034 A, respectively. - In the figure below of the Thevenin equivalent circuit, IL is calculated to be 0.00944 AFigure 1: Thevenin Equivalent Circuit1.28 / (34.76 + RL) = IL1.28 / (34.76 + 100.8) = ILIL = 0.00944 A- When the original circuit is simulated in Multisim using the measured component values, we get a measured value for IL = 0.0109AFigure 2: Original Circuit with Measured Components- Percent difference calculated between calculated values and simulated values and the percent difference between calculated values and measured values of IL:Simulated vs Calculated (0.0109 – 0.00944) / (0.00944) - 100 = 15.47%Measured vs Calculated (0.017 – 0.00944) / (0.00944) - 100 = 80.85%V. Conclusion In conclusion, we evaluated a circuit and found ways to calculate the current in a circuit using different methods. We found that using a Thevenin equivalent circuit can give you the desired results as well as a DMM. From these experiments, we better understand how node voltages and the use of equivalent circuits can both be used to fins information on any given