Guess the fixed-charge signs, based on the trajectory of the
animation (Pause animation)
What is shown :
- Moving charge - unknown sign of the charge
- Fixed charges - unknown signs (+ or - or neutral)
- Green fixed charge - known positive charge
Things to remember:
- Restart or pause animation as you need.
- What are the signs of the various charges?
- What is the sign of the moving test charge?
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