Eugene Khutoryansky has lots of good animated visualizations. E.g., this one on Maxwell's equations: https://youtu.be/9Tm2c6NJH4Y https://youtu.be/9Tm2c6NJH4Y

Eugene Khutoryansky has lots of good animated visualizations. E.g., this one on Maxwell's equations: https://youtu.be/9Tm2c6NJH4Y https://youtu.be/9Tm2c6NJH4Y Circuit Jam helps a bit for practice: https://play.google.com/store/apps/details?id=com.circuitjam https://play.google.com/store/apps/details?id=com.circuitjam Also, stack exchange: https://electronics.stackexchange.com/questions?sort=votes https://electronics.stackexchange.com/questions?sort=votes