This video on electrostatics explains how charging by induction works.
Electric Charge - Physics:
https://www.youtube.com/watch?v=VD009jiZreo
Conservation of Electric Charge:
https://www.youtube.com/watch?v=OSUvXC1pACA
Coulomb's Law:
https://www.youtube.com/watch?v=kCp5yYjo9zE&t=1935s
Physics Videos:
https://www.video-tutor.net/physics-basic-introduction.html
