Puzzle - rank the charge magnitudes

Pick a ranking:

In this simulation, there are three charged particles, one at each corner of an equilateral triangle. A red charge is positive, while a blue charge is negative. The arrow on each of the particles represents the net force that particle experiences because of its interactions with the other two particles - we're neglecting gravitational interactions, and focusing only on the attraction or repulsion associated with charged objects.

Your goal is to rank the particles based on the magnitude of their charges - when you have figured out what the ranking is, press the corresponding ranking button to check your answer. Then, pick a new set of charges and try again. See if you can get 10 correct answers before you get 3 incorrect.

Simulation first posted on 3-7-2016. Updated 7-14-2016 with a revised answer checker. Written by Andrew Duffy

This work by Andrew Duffy is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
This simulation can be found in the collection at http://physics.bu.edu/~duffy/classroom.html.

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