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Get AndrEF old version APK for Android
Electric field produced by two charges
This app shows real movement and path of small charges in an electric field produced by two big charges
- Drag big charges to change its position
-Tap to add small charges (up to 100) to the field and see its movement and path
- Sign of added charges can be changed by user
What's New in the Latest Version 2.2
Last updated on Nov 2, 2025
2.2 Android V
2.1 Android U
2.0 Android T
1.9 Android S
1.8 Android R
1.7 Android Q
1.6 Android Oreo
1.5 Save Image
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AndrEF
2.2 by Leo Rod
Nov 2, 2025