∝ |VR|2then “half power” occurs when|VR| → |VR√2|. Label theseω-andω+respectively.•You will now collect data about the resonant peak to get a better idea of how|VR|andφdepend onω.At each point, record the frequency, amplitude, and phase of the sinewave. The phase can be found by comparing the time of the peaks to those in the Outputvoltage. Be sure to take approximately 5 data points belowω-, 5 aboveω+and at least10 between the two (being sure to includeω-,ω0andω+).•Now you will fit to the amplitude data the following expression, with A, B, C as fittingparameters:|VR(ω)|=Aq1 +B2(ωC-Cω)2(3)•What physical meaning do A, B and C have? What are their units? Verify their theoreticalvalues using your knowledge of the fitting parameters.•You will also fit the phase data with the following model function:|φ(ω)|= arctanDω-Fω(4)•What physical meaning do D and F have? What are their units? Verify their theoreticalvalues using your knowledge of the fitting parameters.2
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