5J30.10 - Ringing Circuit

Code Number:
5J30.10
Demo Title:
Ringing Circuit
Condition:
Excellent
Principle:
Capacitor - Inductor Resonance
Area of Study:
Electricity & Magnetism
Equipment:
Storage Oscilloscope, Overhead Circuit Diagram, Ringing Circuit Demo Unit.
Procedure:

Attach the battery to the snap on battery harness which should always be stored unattached. Connect the BNC lead to the oscilloscope. The oscilloscope will need at least 5 to 10 minutes of warm-up for proper operation. The scope is always left on the proper settings as this is the only demo that this scope is used for. Charge the capacitor by holding down on the proper key switch. Press the buttons in the upper right hand corner of the oscilloscope to clear and reset the screen.  Press the reset button which is located in the lower right-hand side of the oscilloscope.  Discharge the capacitor through the inductor by holding down on the other key switch and observe the trace on the oscilloscope. The capacitance and/or the resistance may be changed to show the affect on the trace.

References:
  • Patrick Doran, William Hawk, P. B. Siegel, "Measuring c With a LC Circuit", TPT, Vol. 52, # 6, Sept. 2014, p. 368.
  • Yaakov Kraftmakher, "Demonstrations with an LCR Circuit", TPT, Vol. 49, #3, Mar. 2011, p. 168.
  • Martin Gardner, "Curious Feedbacks", TPT, Vol. 32, #1, Jan. 1994, p. 59.
  • En-9, 10 :  Freier and Anderson,  A Demonstration Handbook for Physics.
  • R. W. Pohl, "Electrical Oscillations", Physical Principles of Electricity and Magnetism, p. 180.
  • Ron Hipschman, "Very Slow Electric Oscillations", Exploratorium Cookbook III, p. 155.1 - 155.4.
  • W. Bolton, "Discharge of a Capacitor Through an Inductor (1)", Book 4 - Electricity, Physics Experiments and Projects, 1968, p. 65-66.
  • W. Bolton, "Discharge of a Capacitor Through an Inductor (2)", Book 4 - Electricity, Physics Experiments and Projects, 1968, p. 67-68.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.