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Free Energy in Magnetostatic or Electrostatic Fields
American Journal of Physics, 1964The forces acting on a body, and its position of equilibrium, in a uniform magnetic or electric field are determined by the free energy and not by the field energy. Incorrect results are obtained if the field energy is used as a potential function since the work done in a virtual displacement on the distant sources of the field is not taken into ...
Plesset, Milton S., Venezian, Giulio
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Root Response to Magnetostatic Field
IFAC Proceedings Volumes, 1998Abstract Magnetostatic stimuli were fairly applied to the tip of seminal roots of Maize and the response was observed. At 72 hours after sowing, the test seminal roots with almost equal length of 60 mm started to be exposed to seven levels of magnetic field strength, 0.5, 1.6, 5, 16, 50, 160 and 500-G (Gauss) in magnetic flux density, during 48 hours.
A. Sasao +3 more
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1968
In this chapter we shall consider situations in which we have only a static magnetic field. As in the previous chapter, we shall find that the condition that the field be static leads to considerable simplification of the general results obtained in Chapter 2.
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In this chapter we shall consider situations in which we have only a static magnetic field. As in the previous chapter, we shall find that the condition that the field be static leads to considerable simplification of the general results obtained in Chapter 2.
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The field concept in Ampère’s magnetostatics
American Journal of Physics, 2009We update Ampère’s theory using vector notation and derive his expression for the force between two current elements. We assume that the two elements are in different current loops and integrate over one to obtain the force on a differential element in the second.
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Magnetostatic field of electric currents
Electronics and Power, 1964The relationship between the magnetic scalar potential and an electric-current sheet is examined. It is shown that any magnetostatic field in a source-free region of space can always be produced by an electric current flowing on any smooth, closed surface bounding the region.
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Gravitational mass of magnetostatic field
Astrophysics and Space Science, 1996Maxwell's displacement current equation is interpreted in the light of recent work to show that static magnetic field in free space should have a colocated and contemporaneous mass that is neither embodied in, nor can be anticipated from, the mass-energy relation. Thus magnetostatic field in the universe represents an ‘invisible’ mass.
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Magnetostatic mode in a sheared magnetic field
Physics Letters A, 1981Abstract The effect of magnetic shear on the magnetostatic mode is considered. It is found that the lifetime of the mode is shortened, leading to a reduction of the corresponding cross-field diffusion.
M.Y. Yu, P.K. Shukla, K.H. Spatschek
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On the Confinement of a Plasma by Magnetostatic Fields
The Physics of Fluids, 1959The plasma is treated as an assembly of classical particles having masses m+ and m− and charges ±e. It is shown that if such a plasma is in thermodynamic equilibrium it is unaffected by a magnetostatic field. In particular, it cannot be confined by a magnetostatic field and at the same time be in equilibrium.
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Numerical analysis of 3D magnetostatic fields
IEEE Transactions on Magnetics, 1991Formulations of three-dimensional magnetostatic fields are reviewed for their finite-element analysis. Partial differential equations and boundary conditions are set up for various kinds of potentials. Besides the method using two scalar potentials, several vector potential formulations are also discussed.
K. Preis +6 more
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On the singularities of the electrostatic and magnetostatic dipole fields
European Journal of Physics, 2006The singular behaviour of the electrostatic dipole field is compared with that of the magnetostatic one, with pedagogical access to the difference between the two established without necessarily resorting to certain advanced differentiation identities involving delta functions.
P T Leung, G J Ni
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