1. Physics 145 Introduction to Experimental Physics I Instructor: Karine Chesnel Office: N319 ESC Tel: 801- 422-5687 kchesnel@byu.edu Office hours: on appointment Class website: http://www.physics.byu.edu/faculty/chesnel/physics145.aspx

3. Your lab assignments 1.Prepare by reading the introduction material 2.Answer quiz questions (within the first half hour) and submit the sheet to your TA 3.Proceed to the experiments 4.Write a report of your findings for each experiment, in your lab notebook (individual reports)

4. Lab 7-9 LRC circuits

5. Impedances (see Lab 6) Resistor VRVR I Inductor VLVL I Capacitor VCVC I In AC mode:

6. AC Impedances Circuit in series: add impedances

7. AC Gain “Gain” = output / input V in V out RLC circuit RC circuit V in V out RL circuit V in V out

8. Low-pass and high-pass filters RC circuit V in V out Frequency response High-pass Cutoff frequency RL circuit V in V out Frequency response Low-pass Cutoff frequency

9. Time responses RL circuit V in V out When RC circuit V in V out Response time When Response time

10. Resonator V in V out RLC circuit Resonance frequency Resonance Band-pass filter width Behavior of phase

11. AC Impedances Circuit in parallel: add inverses of impedances Notch filter Frequency (Hz)

12. Lab 7: AC impedance & high-pass filter A. Theory and calculation for RC filter L7.1: Compute impedance Z, phase  and gain G L7.2: Check analytical results (Mathematica) L7.3: Design RC filter with f 0 ~ 1 - 5kHz B. Measurements L7. 4, 5: set up the RC circuit L7.6: measure gain G versus frequency f L7.7: Plot G(f) and fit L7.8: Behavior of phase 

13. Lab 8: Low-pass & high-pass filters A. Frequency response for RL filter L8.1: Design a RL filter L8.2: Set up the RL circuit L8.3: Measure gain G versus frequency f, plot and fit L8.4: compare experiment to theory B. Time response for RL filter L8.5: response on a square-wave, measure t RL B. Time response for RC filter L8.6: response on a square-wave, measure t RC, compare

14. Lab 9: RLC resonator A. Measure & analyze RLC resonator L9. 1: Design RLC series circuit for various f 0 ~ 100Hz L9.2: Set up the RLC circuit L9.3: Measure gain G versus frequency f, plot and fit L9.4: Compare experiment to theory L9.5: Behavior of phase  L9.6: Behavior of Z, current I and gain value at resonance B. Parallel RLC circuit – notch filter L9.7: Measure gain G versus frequency f, hole width C. Rms quantities and power dissipation L9.8: measure V rms, I rms and P, feel heating through resistor