ET212_Week 1 Lab_IngramJ

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Grantham University *

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ET212

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Electrical Engineering

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Jan 9, 2024

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Jason Ingram GID: G00151729 Lab 1: Semiconductors and Diode Theory Grantham University Date: 10/30/2023

Introduction: When doing this lab, we are going to construct a circuit using an online software program (Multisim). We will be calculating the current “I”, the voltage that drops from R1 to R2, we will also measure the current using a multimeter tool (Agilent multimeter); which we will then compare with our first calculation for the current “I”. Lastly, using the Agilent multimeter, we will measure the voltage that drops between R1 and R2 and make a comparison with our previous calculation. Equipment/Components:  Multisim  R1 (set at 2.2kΩ)  R2 (set at 1.8kΩ)  A tolerance of 10%  Diode  Ground  DC voltage (set at 12v)  Agilent Multimeter Procedure: This first step of the lab is to first build the circuit using Multisim. Once the circuit has been built according to schematics, we will then make several calculations. The first set of calculations will be done by hand using several equations to obtain the current and the voltage droppage between resistors. Once these calculations have been done, we will then connect the Agilent Multimeter to obtain readings for the current, and voltage droppage between resistors. Once this part of the lab is completed, we will compare findings between the calculated answers and the readings that were obtained from the multimeter tool. Once this portion of the lab is completed, we will then move on to part b, which we will complete the following procedure:  First, reverse the polarity of the diode, followed by analyzing the circuit while repeating the calculations from the fist part of the lab.  Second, we will then construct this new circuit using Multisim, followed by repeating the steps from the first part of the lab while using the Agilent Multimeter.  Finally, we will build a table while using the corresponding units to compare all readings. (All work will be shown at the end of the lab report). Once the first two parts are completed, we can then move on the answering the review questions that will be done at the end of the lab:  Do the simulation results match the calculated values? If not, explain what causes this difference in the measurements.  What is the difference between Part A and Part B with respect to the current and voltage drop in the circuit.

Calculations: Part A: To calculate the current “I”: Voltage drop between resistors: I = V ¿¿¿ R 1 = I ∗ R 1 R 2 = I ∗ R 2 I = 11.4 ( 2.2 + 1.8 ) R 1 = 2.85 mA ∗ 2.2 kΩ R 2 = 2.85 ∗ 1.8 kΩ I = 2.85 mA R 1 = 6.27 V R 1 = 5.13 V Part B (Reverse biasing of the diode) To calculate the current “I”: Voltage drop between resistors: I = V ¿¿¿ R 1 = I ∗ R 1 R 2 = I ∗ R 2 I = 0 ( 2.2 + 1.8 ) R 1 = 0 mA ∗ 2.2 kΩ R 2 = 0 mA ∗ 1.8 kΩ I = 0 mA R 1 = 0 V R 1 = 0 V Circuit design: The start of the circuit:

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The circuit using the Agilent Multimeter: Execution/Results: I could not get my Agilent multimeter to run properly, so I was not able to get an accurate reading. Analysis: Calculated Measured Part A: Current (I) 2.85mA Part A: Voltage drop R1 6.27V Part A: Voltage drop R2 5.13V Part B: Current (I) 0mA Part B: Voltage drop R1 0V Part B: Voltage drop R2 0V Conclusion: The purpose of this lab was to calculate and measure currents along with voltage droppage between R1 and R2. The calculations were able to be completed as the numbers for the resistors were already stated in the given facts, but the measurements were not able to be obtained due to error on my part.  Do the simulation results match the calculated values? If not, explain what causes this difference in the measurements.

 What is the difference between Part A and Part B with respect to the current and voltage drop in the circuit.