After discussing the static electric field and steady currents, we are now ready to take another significant step in the study of electromagnetics; the study of the static magnetic field. But what exactly is a magnetic field? This question will be answered gradually, but, for a simple description, we may say it is a new type of force field in the same sense that the electric field is a force field. Take, for example, a magnet. It attracts or repels other magnets and generates a “magnetic field” around itself. The permanent magnet generates a static (time independent) magnetic field. A direct current can also generate a static magnetic field. How do we know that? As with many other aspects of electromagnetics, we know by experiment.
KeywordsMagnetic Field Magnetic Flux Current Sheet Static Magnetic Field Magnetic Field Intensity
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