The Physlet problems listed here are mostly used during lecture as visualization tools and to prompt Peer Instruction type questions.
Physlet problems that I've used for homework are available in the WebAssign database.
All problems and animations have been written by Aaron Titus with help from Wolfgang Christian, Mario Belloni, Melissa Dancy, and others. Physlets are used with permission of Wolfgang Christian of Davidson College.
For additional Physlets, please see the Physlet Workbook by Wolfgang Christian and Mario Belloni, Prentice Hall (2003).