This work is based on the variational principle for magnetic field lines introduced in 1983 by Cary and Littlejohn. The action principles for magnetic fiel
is a measure of thestrength of the magnetic field. Specifically, 1 Gauss is equivalent to 1 magnetic field line within 1 square centimeter.Also, the direction of the tangent to the field line is the direction of the magnetic field at that point and is the direction a compass would point....
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook Encyclopedia Wikipedia the hypothetical fluid whose existence was formerly assumed in the explanations of the phenomena of magnetism; - no longer considered a meaningful concept. ...
magnetic field lines. Figure .1 Compass needles can be used to trace the magnetic field lines in the region outside a bar magnet. Note that the magnetic field lines outside the magnet point away from north poles and toward south poles. ...
Magnetic north corresponds to magnetic field lines and is what your compass locates. During a pole reversal, Earth’s magnetic north and south poles exchange locations. This happens on average every 300,000 years or so, but the last reversal occurred around 780.000 years ago. Some scientists ...
magnetic field lines.Compass needles are just small___which twist into alignment with the Earth's magnetic field.Just as an electric charge is surrounded by an electric field, the same charge isalso surrounded by a magnetic fieldif it is ___and/or if the electrons (charges in the atoms...
During a reversal, the main field weakens, almost vanishes, and reappears with opposite polarity (极). The transition would take thousands of years. Once completed, compass needles that had pointed north would point south. A reversal could cause problems for both that rely on the magnetic ...
Earth's magnetic field originates in the outer core and extends out into the magnetosphere — a region of space that helps protect Earth from space weather.
1.(General Physics) a body that can attract certain substances, such as iron or steel, as a result of a magnetic field; a piece of ferromagnetic substance. See alsoelectromagnet 2.a person or thing that exerts a great attraction [C15: via Latin from Greekmagnēs,shortened fromho Magnēs li...
Most of our daily experience with magnetic fields involves either sticking things to our refrigerator, or perhaps using a compass to point north. The latter shows the existence of magnetic fields generated by our planet. Our sun also creates a vast magnetic...