Point your in the direction of the current (where the electricity is flowing). Curl your fingers.
Electromagnetic theory isn't about memorizing math; it’s about understanding that the entire world is connected by invisible, wiggling strings of energy. Once you see the "field," the math starts to make a lot more sense.
If you run electricity through a wire, you create a magnetic field. This is how junkyard magnets pick up cars. 3. What is Light, Anyway? electromagnetic theory for complete idiots pdf
If you ever see a wire and need to know where the magnetic field is going:
This was Maxwell’s "Aha!" moment. He realized that if an electric field changes, it creates a magnetic field. That magnetic field then changes, which creates an electric field. Point your in the direction of the current
Imagine a giant, invisible trampoline that covers the entire universe. That is a .
If you wiggle a magnet near a wire, you create electricity. This is how every power plant on Earth works. Once you see the "field," the math starts
This is created by stationary charges. Think of a sock sticking to your shirt in the dryer.