written by
Gary Gladding
published by
the University of llinois Physics Education Research Group
This interactive homework problem displays three charges. The user is asked to determine how much work is necessary to move the middle charge from infinity into this arrangement.
The problem is accompanied by a Socratic-dialog "help" sequence designed to encourage critical thinking as users do a guided conceptual analysis before attempting the mathematics. Immediate feedback for both correct and incorrect responses is provided through each step of the problem-solving. This item is part of a larger collection of interactive problems developed by the Illinois Physics Education Research Group.
<a href="https://www.compadre.org/introphys/items/detail.cfm?ID=6451">Gladding, Gary. Illinois PER Interactive Examples: Three Charges. Urbana: University of llinois Physics Education Research Group, June 16, 2006.</a>
G. Gladding, (University of llinois Physics Education Research Group, Urbana, 2002), WWW Document, (https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/02/p3).
G. Gladding, Illinois PER Interactive Examples: Three Charges (University of llinois Physics Education Research Group, Urbana, 2002), <https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/02/p3>.
Gladding, G. (2006, June 16). Illinois PER Interactive Examples: Three Charges. Retrieved May 14, 2025, from University of llinois Physics Education Research Group: https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/02/p3
Gladding, Gary. Illinois PER Interactive Examples: Three Charges. Urbana: University of llinois Physics Education Research Group, June 16, 2006. https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/02/p3 (accessed 14 May 2025).
Gladding, Gary. Illinois PER Interactive Examples: Three Charges. Urbana: University of llinois Physics Education Research Group, 2002. 16 June 2006. 14 May 2025 <https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/02/p3>.
@misc{
Author = "Gary Gladding",
Title = {Illinois PER Interactive Examples: Three Charges},
Publisher = {University of llinois Physics Education Research Group},
Volume = {2025},
Number = {14 May 2025},
Month = {June 16, 2006},
Year = {2002}
}
%A Gary Gladding %T Illinois PER Interactive Examples: Three Charges %D June 16, 2006 %I University of llinois Physics Education Research Group %C Urbana %U https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/02/p3 %O text/html
%0 Electronic Source %A Gladding, Gary %D June 16, 2006 %T Illinois PER Interactive Examples: Three Charges %I University of llinois Physics Education Research Group %V 2025 %N 14 May 2025 %8 June 16, 2006 %9 text/html %U https://ie.per.physics.illinois.edu/per/ie/ie.pl?phys102/ie/02/p3
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This is a link to the full collection of interactive homework problems by the same author. Complete problem sets are available for both algebra-based and calculus-based courses in introductory physics.
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