Earnshaw's theorem states that a collection of point charges cannot be maintained in a stable stationary equilibrium configuration solely by the electrostatic...

originated with Samuel Earnshaw in 1839 and was formalized by James Clerk Maxwell in 1874 who gave it the title "Earnshaw's theorem" and proved it with the...

the type of magnetic fields that can be produced by dynamo action. Earnshaw's theorem states that a collection of point charges cannot be maintained in...

{\displaystyle \mu _{0}} = 4π×10−7 N·A−2 is the permeability of the vacuum. Earnshaw's theorem proves that using only paramagnetic materials (such as ferromagnetic...

power consumption. Earnshaw's theorem seems to preclude the possibility of static magnetic levitation. However, Earnshaw's theorem applies only to objects...

power but are difficult to design due to the limitations described by Earnshaw's theorem. Techniques using diamagnetic materials are relatively undeveloped...

contributions to theoretical physics, especially for proving Earnshaw's theorem. Earnshaw was born in Sheffield and entered St John's College, Cambridge...

(physics) Earnshaw's theorem (electrostatics) Maximum power theorem (electrical circuits) Norton's theorem (electrical networks) Optical theorem (physics)...

in terms of Christoffel symbols. Weyl's lemma (Laplace equation). Earnshaw's theorem which shows that stable static gravitational, electrostatic or magnetic...

field. This is a consequence of Earnshaw's theorem. However, physicists have various ways of working around this theorem by using combinations of static...

rendering stable levitation impossible for magnetic objects (see Earnshaw's theorem). Strongly diamagnetic materials, however, can levitate above powerful...

with electromagnets only used to stabilise the effect. According to Earnshaw's Theorem a paramagnetic body cannot rest in stable equilibrium when placed...

describes the electric force between two point charges. Another result, Earnshaw's theorem, states that a collection of point charges cannot be maintained in...

expression of the force between two magnetic dipoles. Dipole magnet Earnshaw's theorem Electret Electromagnetic field Electromagnetism Halbach array Magnetic...

each other, their fields completely cancel out (in accordance with Earnshaw's theorem). But if there is a space between them (and the length of this has...

Quadrature domains Potential theory Potential flow Bateman transform Earnshaw's theorem uses the Laplace equation to show that stable static ferromagnetic...

electromagnetic forces held matter together. However two problems co-existed. Earnshaw's theorem from 1842, proved that no charged body can be in a stable equilibrium...

one solution. Over long distances coil costs could be prohibitive. Earnshaw's theorem shows that no combination of static magnets can be in a stable equilibrium...

in a uniform magnetic field, only intersect once per revolution. Earnshaw's theorem shows that simultaneous focusing in two directions transverse to the...

employing novel configurations for the supporting magnetic fields. Earnshaw's theorem does not allow for a static configuration of permanent magnets to...

optics, having similar properties regarding beam focusing (but obeying Earnshaw's theorem). The general equations of motion originate from relativistic Hamiltonian...

particles cannot be trapped in 3D by just electrostatic forces because of Earnshaw's theorem. Instead, an electric field oscillating at radio frequency (RF) is...

charged particle in all three directions (this restriction is known as Earnshaw's theorem). It is possible, however, to create an average confining force in...

Henry Perkin Dew Point Hygrometer – John Frederic Daniell Earnshaw's theorem – Samuel Earnshaw Electrical generator (dynamo) – Michael Faraday Electromagnet...

the Braunbek coil, a modified Helmholtz coil. In 1939, he disproved Earnshaw's theorem by showing that there are magnetic fields in which small diamagnetic...

Beam Physics Earl W. McDaniel Earle Hesse Kennard Earle M. Terry Earnshaw's theorem Earth's magnetic field Earth's shadow Earth, Moon, and Planets Earth-Moon...

History Faculty at the University of Oxford 25 October 2012 Fermat's Last Theorem Marcus du Sautoy, Professor of Mathematics & Simonyi Professor for the...

itself Bertrand's theorem – Physics theorem Hyperbolic spiral – Spiral asymptotic to a line Newton's theorem of revolving orbits – Theorem in classical mechanics...

example that not any function is integrable; and, in the proof of the theorem for the Fourier series, the Dirichlet kernel and Dirichlet integral. He...

et particulière. April 12 – Euler produces the first proof of Fermat's theorem on sums of two squares, based on infinite descent. April 12 – Official...