Download Lab 2: Kirchhoff’s Laws - Eclectic Circuit Analysis Lab | ECE 2074 and more Lab Reports Electrical Circuit Analysis in PDF only on Docsity! Lab-in-a-Box Lab 2: Kirchhoff’s Laws Name: ______________________ Pledge: _____________________ ID: ______________________ Date: ______________________ Procedure R 2 1 k V 1 9 V d c C 0 R 1 6 8 0 A B R 3 2 . 2 k D Figure 1: Circuit for verifying Kirchhoff’s laws. Analysis: 1. Calculate the equivalent resistance of the circuit. You can do this by finding the equivalent resistance of the parallel resistors R2 and R3 and adding the result to the series resistor R1. 2. Use the result of Step 1 and Ohm’s law to find the total current in the circuit. This is equal to IDA. 3. Use Kirchoff’s laws to find ABV , DAV , 2I and 3I where I2 and I3 are the currents in R2 and R3, respectively, as identified in Figure 1. Use the passive sign convention to determine the direction of positive current flow for 2I and 3I . 4. Show that DA 2 3 0I I I . Which law does this result confirm? 5. Show that CD DA AB 0V V V . (Note that VCD can be found directly from the source V1.) Which law does this result confirm? 1 of 3 6. What is the relationship between the voltage drop across R2 and R3? Use KVL to make a general statement about voltage in parallel branches. 7. Calculate the power dissipated in each resistor and the total power dissipated ( disP ) in the circuit. 8. Calculate the power generated ( genP ) by the source, sV . 9. Does the total power generated equal the total power dissipated? Modeling: 7. Draw the circuit shown in Figure 1 in PSpice. 8. Using a Bias Point PSpice simulation, find the branch currents and node voltages for the circuit. Insert a screenshot of your circuit, with the voltages and currents, here. 9. Verify that the results agree with your analysis. If not, comment on the discrepancies. Measurements: 10. Construct the circuit shown in Figure 1on your breadboard. Note that V1 is provided by the ANDY board. 11. Using your multimeter, measure ABV , DAV , DAI , 2I and 3I . Use the information from your analysis to determine the correct range on the DMM for each measurement. Follow the techniques discussed in lecture for measuring current and voltage. Basically if you are measuring VXY for some nodes X and Y, put the red probe at X and the black probe at Y. Use the passive sign convention that a voltage rise is positive and that a current entering a node is positive. 12. Use the measured values to compute CD DA ABV V V . Is the result zero (within experimental error)? 13. Use the measured values to compute the current leaving node “A,” 2 3DAI I I . Note that the minus signs result because 2I and 3I are entering node “A” as defined in step Error: Reference source not found above. Is the result zero (within experimental error)? 2 of 3
