An electric current or a changing electric field creates a magnetic field. This is how electromagnets and antennas function. Why Does This Matter?
Have you ever wondered how your phone catches a signal out of thin air, or how a magnet pulls a paperclip without touching it? The answer lies in . While it sounds like heavy-duty physics (and it can be!), the core concepts are actually quite elegant and govern almost everything in our modern world. Electromagnetic Field Theory Fundamentals
Magnetic fields only affect other moving charges or magnetic materials. The "Glue": Maxwell’s Equations An electric current or a changing electric field