SOURCE OF MAGNETIC FIELD EBOOK DOWNLOAD!
A short summary of 's Sources of Magnetic Fields. This free synopsis covers all the crucial plot points of Sources of Magnetic Fields. Field near a long, straight current-carrying conductor Page 7 - Electric field lines radiate outward from + line charge distribution. They begin and end at electric charges. - Magnetic field lines encircle the current that acts as their source. Topics for Chapter • Magnetic field generated by a moving charge. • Magnetic field generated by a current-carrying conductor, current loop and infinitely long.
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Such diverse sources give rise to complex phenomena, only explainable through vector calculus and difficult mathematics. This SparkNote will try to cover most sources on a basic level, but also provide the necessary mathematics to provide for a complete understanding of the topic.
We begin by describing magnets. Though they are easily describable in terms of north and south poles, their magnetic fields are actually quite complicated, source of magnetic field are not examined on a quantitative basis. In the same section, we move on to perhaps the simplest source of a magnetic field, a straight wire.
From this point we must develop some calculus regarding magnetic fields before analyzing more complex phenomena.
Compass needles point in the direction of the local magnetic field, towards a magnet's south pole and away from its north pole. Mapping the magnetic field of an object is simple in principle.
First, measure the strength and direction of the magnetic field at a large number of locations or at every point in space. Then, mark each location with an arrow source of magnetic field a vector pointing in the direction of the local magnetic field with its magnitude proportional to the strength of the magnetic field.
An alternative method to map the magnetic field is to 'connect' the arrows to form magnetic field lines. The direction of the magnetic field at any point is parallel to the direction of nearby field lines, and the local density of field lines can be made proportional to its strength.
SparkNotes: Sources of Magnetic Fields: Introduction and Summary
Magnetic field lines are like source of magnetic field in fluid flowin that they represent something continuous, and a different resolution would show more or fewer lines. An advantage of using magnetic field lines as a representation is that many laws of magnetism and electromagnetism can be stated completely and concisely using simple concepts such as the 'number' of field lines through a surface.
These concepts can be quickly 'translated' to their mathematical form. For example, the number of field lines through a given surface is the surface integral of the magnetic field. Various phenomena have the effect of "displaying" magnetic field lines as though the field lines were physical phenomena.
For example, iron filings placed source of magnetic field a magnetic field, form lines that correspond to 'field lines'. Source of magnetic field lines can be used as a qualitative tool to visualize magnetic forces. In ferromagnetic substances like iron and in plasmas, magnetic forces can be understood by imagining that the field lines exert a tensionlike a rubber band along their length, and a pressure perpendicular to their length on neighboring field lines.
List three sources of magnetic fields
The rigorous form of source of magnetic field concept is the electromagnetic stress—energy tensor. Magnetic field and permanent magnets[ edit ] Main article: Magnet Permanent magnets are objects that produce their own persistent magnetic fields.
They are made of ferromagnetic materials, such as iron and nickelthat have been magnetized, and they have both a north and a south pole.
Magnetic field of permanent magnets[ edit ] Main articles: