Photonics101.com - Understand Electromagnetism!
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Our most prominent section provides worksheets to learn electrodynamics.
In this section you can learn about electrostatics, magnetostatics, circuit theory and even full electrodynamics.
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Sometimes it happens that a thing is more than the sum of its parts. What about two charges? Can their respective electric field behave fundamentally different in some way than just a single charge? In this problem you will learn about two main concepts in electromagnetics - the superposition principle and the dipole.
What happens if we take a wire, drill a hole in it and set some current in motion? Will we encounter a magnetic field?