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Inquiry Based Methods for Combinations of Capacitors Douglas Young

Inquiry Based Methods for Combinations of Capacitors Douglas Young Mercer University Physics Department AAPT-SAC Meeting March 6, 2004. Review: Lightbulbs & Batteries Exercises. Long and venerable history:

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Inquiry Based Methods for Combinations of Capacitors Douglas Young

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  1. Inquiry Based Methods for Combinations of Capacitors Douglas Young Mercer University Physics Department AAPT-SAC Meeting March 6, 2004

  2. Review: Lightbulbs & Batteries Exercises • Long and venerable history: • “Teaching electricity with batteries and bulbs,” James Evans, TPT 16 p. 15-22 (Jan 1978) • “Research as a guide for curriculum development: An example from introductory electricity. Part I: Investigation of student understanding,” Peter Shaffer and Lillian McDermott AJP 60 (11) p. 994-1003 (November 1992) • “Research as a guide for curriculum development: An example from introductory electricity. Part II: Design of instructional strategies,” Peter Shaffer and Lillian McDermott AJP 60 (11) p. 1003-1013 (November 1992)

  3. Archetype Inquiry-based batteries/bulbs problem

  4. Treatment ofCombinations of Capacitors in Inquiry-Based Literature – PEG Tutorials

  5. My idea • Use RC circuit to teach capacitance • =RC for RC circuit, using C=1 F capacitors and lightbulb for R • Demo • Use RC circuit to teach capactitance • =RC for RC circuit • Demo

  6. Problem • Higher initial voltage causes discharge to take about the same amount of time => Ruins capacitance measurements • Charge to same voltage; Charge as a unit • Demo

  7. Capacitors in Parallel

  8. Ultimate Objective

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