Magnetic field - Wikipedia, the free encyclopedia
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Magnetic fields surround magnetic materials and electric currents and are detected by the force they exert on other magnetic materials and moving electric charges. The magnetic field at any given poi...
en.wikipedia.org/wiki/Magnetic_field
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Magnetic field lines do not begin or end, but always close like a circle. ... Magnetic field lines circle around currents. ... For example, below are shown the magnetic field lines of a small current loop (a magnetic dipole).
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www.pa.msu.edu/courses/1997spring/PHY232/lectures/amper...
www.pa.msu.edu/courses/1997spring/PHY232/lectures/ampereslaw/lines.html
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Another way to visualize the magnetic force field associated with a magnetic dipole is to plot the field lines for the force. Field lines are nothing more than a set of lines drawn such that they are everywhere parallel to the direction of the force you are trying to describe, in this case the magnetic force.
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www.earthsci.unimelb.edu.au/ES304/MODULES/MAG/NOTES/fie...
www.earthsci.unimelb.edu.au/ES304/MODULES/MAG/NOTES/fieldl.html
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Explanation of the concept of magnetic field lines (lines of force) and its use in space studies, as part of the educational exposition 'The Exploration of the Earth's Magnetosphere' ... Magnetic field lines similarly describe the structure of magnetic fields in three dimensions.They are defined as follows.
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www-istp.gsfc.nasa.gov/Education/wfldline.html
www-istp.gsfc.nasa.gov/Education/wfldline.html
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Field line - Wikipedia, the free encyclopedia
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A field line is a locus that is defined by a vector field and a starting location within the field. Field lines are useful for visualizing vector fields, which are otherwise hard to depict. Note tha...
en.wikipedia.org/wiki/Field_line
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History of magnetic field lines, the concept of fields and electromagnetic waves, as part of the educational exposition 'The Exploration of the Earth's Magnetosphere' ... #5H. Magnetic Field Lines -- History...
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www-spof.gsfc.nasa.gov/Education/whfldlns.html
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So, let's look at some field lines and magnetic fields around various magnets. For these diagrams, I used a small arrow inside the magnet to show the direction of the magnetic field lines. The head of the arrow would be pointing to the North pole of the magnet and away from the South pole of the magnet.
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my.execpc.com/~rhoadley/field01.htm
my.execpc.com/~rhoadley/field01.htm
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The following physlet lets you use a small virtual compass (the circle/arrow) to explore the magnetic field around one or two bar magnets (just as you do in class with a real compass and magnet). You can drag the compass around with the mouse to see the field at different points.
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www.smaphysics.ca/phys30s/field30s/barmagnets.html
www.smaphysics.ca/phys30s/field30s/barmagnets.html
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