EE215, Laboratory 6 Page 1Steady State Sinusoidal ACDue: At recitation week of May 29-June 1ObjectivesAt the end of this lab you will be able to:- Measure AC and DC voltages- Understand what happens when measuring AC voltages with a DC voltmeter, and vice versa.- Give the range of variation in wall socket voltages- Explain AC voltage and current readings in circuits with capacitors and inductorsRemarksFor safety reasons, do NOT directly measure AC wall voltages. Yes, you can actually do this safely with your meter if you are very careful to set it to measure voltage and not current, and make sure you only touch the insulated (plastic) parts of the probes, and not the conducting (metal) bits. But for this lab, don't do it. Materials and SuppliesThe new part for this lab is the 9VAC transformer, or "wall wart". It converts from 120V AC to 9V AC withthe same frequency. It just plugs in to the wall. Be careful not to short circuit the output leads.(Note that many wall warts that look like this include a diode in the case and do not output true AC. This one does not have a diode.)Procedure 1a. (10 points) Pick your favorite wall socket. Plug the transformer into the wall socket, Measure and record the voltage at the transformer output using the AC voltage and DC voltage settings on your multimeter. Now measure and record the voltage of your 9V battery using the AC voltage and DC voltage settings. Compare the readings and explain why each is what it is. Hint: DC measures average voltage. AC filters out DC before measuring, unless you have an (expensive) true RMS meter. (You do not need to buy one forthis lab!)b. (5 points) Measure the AC transformer output voltage, using the AC voltage setting of your multimeter, at least three times a day for two days. Try to get a measurement in the morning, some time in the middle of the day (lunch, or if you get home around 5PM) and again just before you go to sleep. You must use the same wall socket for these measurements. If you can do one day as a weekday and one as a weekend, so much the better.c. (10 points) Plot the measurements from part b. Calculate how much they vary (in percent) from high to low. Try to explain why they vary.Procedure 2a. (5 points) Build circuit 1. Note: You do not appear tohave a 26.2 KΩ resistor in your parts kit. Perhaps you cancreate a resistor combination with an equivalent resistanceas close as possible to 26.2 KΩ.b. (10 points) Supply circuit 1 with your 9V battery andmeasure and record DC voltage across each resistor and thesource. Then supply it with the 9V AC from thetransformer output (you do NOT have to use the same wallsocket as in Procedure 1, although you can if you want to)and measure and record the AC voltage across eachR. D. Christie 5/22/0130Ω26.2KΩvsCircuit 1EE215, Laboratory 6 Page 2resistor, and of the source. Calculate the current using the voltage across the 30Ω resistor. Allowing for the variation in source voltages, are the measured voltages andcurrents about the same? Why?c. (5 points) Build circuit 2 and repeat part b. Explain why theAC and DC voltages and currents are different - or why theyare not.d. (5 points) Compare the AC voltages and currents betweencircuit 1 and circuit 2. Do you expect them to be about thesame, or significantly different. Explain why. Are they whatyou expect? (They should be!)Procedure 3a. (10 points) Build circuit 3. Design an experiment (i.e. planwhat measurements to take) to verify KVL for this circuit.Perform the experiment. Does KVL hold? Explain why or whynot.b. (5 points) Build circuit 4. Measure and record the ACvoltage across the inductor and resistor. Use the voltage acrossthe resistor to determine current. Calculate the expectedvoltage and current values using the measured value of thesource voltage. Do your calculations match yourmeasurements? (Don't forget the internal resistance of theinductor you found in Lab 5.)c. (5 points) Add the 0.01 μF capacitor in parallel with theinductor in circuit 4. Measure AC voltage across the resistor and calculate current. Did current go up or down? (This change is small.) Why?d. (10 points) Calculate the nominal impedance of eachcomponent in the circuit you used in part c. Calculate themagnitude and angle of the current supplied by the 9Vtransformer, assuming the voltage has zero angle. Explainwhether your calculated result is consistent with yourobservations in part c.Bring the circuit of part c to recitation (20 points).R. D. Christie 5/22/0130ΩvsCircuit 20.1μF26.2 KΩ9VACCircuit 30.1μF100Ω9VACCircuit 4LJ