Physics Lab 212P 10 The Oscilloscope AC Circuits NAME LAB PARTNERS LAB SECTION LAB INSTRUCTOR DATE EMAIL ADDRESS Exercise 1 Using the oscilloscope as a DC voltmeter Q1 Write down the readings you obtained above Single battery Volts Div Vertical deflection cm Voltage V Two batteries in series Penn State University Volts Div Physics 212P 10 Written by Redwing and Samarth 1 Vertical deflection cm Voltage V Exercise 2 Using the oscilloscope to measure the amplitude and frequency of a periodic voltage signal Q2 Suppose you want to measure the frequency of an input signal using the scope Describe how you would go about doing this i e write down an equation that relates frequency f the setting on the sec div scale and the period of the sine wave as observed on the horizontal scale Exercise 3 Using the oscilloscope to analyze a series R L C circuit Q3 Using an Excel spreadsheet plot the voltage amplitude versus frequency Include a printout of the graph with your lab report Q4 Approximately at what frequency is the voltage amplitude a maximum This is known as the resonant frequency of the circuit Resonant frequency Q5 We mentioned earlier that the impedance Z is a minimum at a particular resonant frequency Use the expression for Z to show that the resonant frequency is related to the capacitor and the inductor in the circuit by R LC 1 2 Use this relationship and the value of C 100 F to deduce the value of the inductance L Penn State University Physics 212P 10 Written by Redwing and Samarth 2