E11 Lab 1 Report
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This lab does not have a formal report, you should simply turn in the information requested.  Include a title page with title of lab, the names of people in your group, the day the lab was performed, and the day you turned in the lab.  You should feel free to include handwritten sections if it is quicker than formatting equations, or making computer drawings...

1) Verification of ohms law (part 1 of lab):

• Use Kaleidagraph to plot I vs V for the 10k Ohm resistor and for the 20k Ohm resistor. Include a best fit straight-line for the data as calculated by Kaleidagraph.  The slope of the graph, V/I, will give the resistance.  Print out both the spreadsheet and the graphs in your report. Make sure that you show both your experimental and your best fit line on the same graph for easy comparison.   Make sure the axes of your graph are clearly marked, including labels, scales, and units.
• Present the values for resistance from the spreadsheet with the given value of the resistor.

2) Introduction to the op amp (part 3 of lab):

• Present a derivation showing that the gain of the op amp circuit is -Rf/R1.
• Include two printouts from the oscilloscope showing the circuit operating with and without distortion.
• Plot Vin vs Vout for the waveform data you collected from the scope, and use a best-fit line in Kaleidagraph to calculate the gain (Vout/Vin).
• Show your values for Rf and R1 and compare the equation for gain, -Rf/R1, to the value calculated from Kaleidagraph.

1. Voltage, Current, Ammeters and Voltmeters
Answer the following briefly, at most one or two sentences for each.
1. If the voltmeter is to give an accurate reading of a voltage without affecting the circuit being measured, does it behave as an open circuit, or a short circuit?  Explain.
2. If the ammeter is to give an accurate reading of current without effecting the circuit being measured, does it behave as an open circuit, or a short circuit?  Explain.
3. Redraw the circuit shown with an ammeter and a voltmeter included such that the current through R1 and the voltage across R2 are being measured.  What reading would you expect from each meter?

4. Repeat (c) but measure the total current through both R1 and R2 combined, and the battery voltage.  What reading would you expect from each meter?

5. Briefly explain the difference between voltage and current.
1. The Function Generator and oscilloscope:
Answer the following briefly, one sentence for each.  The voltage and time scales are the same for all of the images shown below.
1. Consider Images IIa1 and IIa2.  If you know that only an adjustment to the function generator was made, what was that adjustment?
 Image IIa1 Image IIa2

2. Consider Images IIa1 and IIa2.  If you know that the only difference has to do with the coupling mode of the oscilloscope, which mode is active in each image?
3. Consider Images IIc1 and IIc2..  What single adjustment to the triggering of the oscilloscope would go from one to the other?
 Image IIc1 Image IIc2

4. Consider Image IIa1 and Image IIc2.  What single adjustment to the triggering of the oscilloscope would go from one to the other?

email me with any comments on how to improve the information on this page (either presentation or content), or to let me know if you had any particular difficulties with this lab.

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