Maxwell Definition and 505 Threads

Ghislaine Noelle Marion Maxwell ( ghee-LAYN, -⁠LEN; born 25 December 1961) is a British socialite known for her association with financier and convicted sex offender Jeffrey Epstein. She worked for her father, the publishing tycoon Robert Maxwell, until his death in 1991, when she moved to the United States and became a close associate of Epstein. Maxwell founded a non-profit group for the protection of oceans, The TerraMar Project, in 2012. The organisation announced cessation of operations on 12 July 2019, a week after the sex trafficking charges brought by New York federal prosecutors against Epstein became public.In 2020, Maxwell was charged by the US federal government with the crimes of enticement of minors and sex trafficking of underage girls. The US Virgin Islands Department of Justice announced on 10 July 2020 that Maxwell was also under investigation in the Caribbean territory.

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  1. J

    Covarient Maxwell: Explaining 2nd Line From Attachment

    can some tell me why the second line follows from the first in the attachment thank you
  2. S

    Understanding the Displacement Current: Examining the 4th Maxwell Equation

    Homework Statement Simple question: - I am not sure about the translation: That second term is called displacement current? Or not? - The question: Is the displacement current a consequence of time dependant electric field OR is it the other way around? :/ Homework Equations ##\nabla \times...
  3. M

    Ansoft maxwell 15, parameters-assign-matrix option disappear

    I am learning to use software to do some simple simulation. It seems that the Maxwell 2D/3D-parameters-assign-matrix option disappears sometimes. Under the menu of Mawell 2D-Parameters-Assign, only Force and Torque can be seen. In what cases the Matrix option is visible? What should I do if I...
  4. M

    Maxwell ansoft region effect to solve

    Hi i have to solve problem in maxwell ansoft in magnetic step . When i create a region (no mesh and no boundray for region) my answered is not real and it is change when i change size a region (i try to solve B in center of coordinate of coil)
  5. P

    Ansoft Maxwell -- shaping an interior electric motor rotor

    For shaping an interior PMSM rotor from top figure to as in bottom fig, I made an equation based curve, united with another curve , made a surface using coverline and united that shape with my rotor. When validated it showed band and rotor intersecting and I adjusted the band - DiaGap. Then...
  6. C

    Curved-space Maxwell equations by differential forms?

    The flat-space source-free Maxwell equations can be written in terms of differential forms as $$d F = 0; \ \ d \star F = 0.$$ And in the theory of gauge fields, one can introduce a connection one-from A from which one can formulate general Maxwell equations (for Yang-Mills fields) by $$ dF + A...
  7. M

    Help with ANSOFT MAXWELL 3D Magnetic material

    Hi I'm having an issue ANSOFT MAXWELL : Assigning a permanent magnetic material to a body (for ex NDFE35) provides me a means of setting the magnetization direction (through x,y,z unit vectors ) inside the material settings so if i have multiple PM bodies rotated :- 1- do i need to create a...
  8. P

    Maxwell 3D Analysis error -- please somebody help with the error

    hi dear friends i face with this error in Maxwell 3d analysis please help me Surface recovery failure. Possible reasons: (1). Model has multiple objects with thin layers. (2). Complex model with object overlapping. (3). True surfaces are skewed what should i do?
  9. P

    How Do You Determine Motor or Generator Mode in ANSYS Maxwell?

    HI my dear friends i come back after few month absence:) is there anyone here who know how to determine motor mode or generator mode in ansys maxwell? i hope someone answer to this little question:) have nice time
  10. H

    Relationships between integration limits of Maxwell Equation

    I don't understand the relationships between the integration limits of Maxwell Equations (specifically the ones in integral form in matter) Is this related to Stokes/Gauss' Theorems? or something else?
  11. T

    When Does the Second Part of Maxwell's Fourth Equation RHS Not Equal Zero?

    Can someone please explain to me under what circumstance the second part of the RHS is not equal to zero. I only remember the video: deriving it 44:30 minutes in, I don't really understand it. Cheers
  12. T

    Understanding Tokamak Heating: Exploring Maxwell's Equations and Magnetic Fields

    HI, Some things I want to confirm, somethings I need to be reminded of: So what I remember is that Magnetostatics - stationary charges Electrostatics - constant or slow moving charges And that an accelerating charge makes a magnetic field, but you need a time varying field to move charges. So...
  13. C

    Ansoft Maxwell guidelines -- Simulate E(r) for charged sphere

    Hello, I have to compare the real solution of the electric field radiated by a sphere, having 10 cm radius, charged with 1e-012 C (perfect conductor), something like E=f(x) where x is distance from the sphere, from 0m (surface of the sphere) to 1m, with numerical solution. I tried Ansoft...
  14. M

    How can I successfully simulate a Transient 3D solver using ANSOFT MAXWELL?

    Hi All, I'm starting using ANSOFT MAXWELL and stuck in simulating a Transient 3D solver i'm simulating a simple permanent magnet setup (attached an image) to examine fields/forces/motion M1 is rotating around Z-Axis while M2 is fixed out of the motion setup I'm seeking some guidance to get...
  15. P

    Maxwell Lagrangian at weak fields

    In http://arxiv.org/abs/hep-th/9506035 the author said after writing this equation: $$\frac{1}{4}\eta^{\mu\nu\lambda\rho} F_{\mu\nu}F_{\lambda\rho} = \eta_{\sigma\tau\alpha\beta}\frac{\partial L}{\partial F_{\sigma\tau}} \frac{\partial L}{\partial F_{\alpha\beta} } + 2C$$ where C was arbitrary...
  16. A

    Understanding Maxwell Relations to Deriving (∂U/∂P)V=-T(∂V/∂T)S

    1. Derive (∂U/∂P)V=-T(∂V/∂T)S 2. I must use dU=TdS-PdV 3. Derivations are my weakest part of math. I checked many wikis about Total differentials, partial derivatives, Maxwell relations and derivations. I can use the Thermodynamic Square, I know how to find different Maxwell relations but I am...
  17. T

    Maxwell relations Thermodynamics

    Homework Statement Show that: (\frac{∂T} {∂V})_S,_n=-(\frac {∂P} {∂S})_V,_n Homework Equations dU=TdS-PdV+μdn The Attempt at a Solution \frac {∂} {∂S} (\frac{∂U} {∂V})_S,_n=-(\frac {∂P} {∂S})_V,_n \frac {∂} {∂V} (\frac{∂U} {∂S})_V,_n=(\frac{∂T} {∂V})_S,_n I tried to isolate T and P...
  18. F

    Ansoft Maxwell 15 Coil simulation

    Hello! I am a student of electrical engineering. I got assigned to a project where I need to simulate a coil in Maxwell 15 and a ball which floats in the magnetic field of the coil. This is for an experiment for demonstrating magnetsim, so my task is to find out what dimensions the coil needs...
  19. R

    Did James Clerk Maxwell Ever Draw a Picture of an Electromagnetic Wave?

    Did James Clerk Maxwell Ever Draw a Picture of an Electromagnetic Wave in any of his notebooks? Who was the first one to draw one? Would love to find the first picture representing it all! I am looking for the first example of a drawing looking like this showing the perpendicular sinusoidal...
  20. G

    Using the Green's function for Maxwell

    Homework Statement I need to calculate, in D=4, the time component of the vector potential, A_{0}, given the equation (below) for A_{\mu} with the Green's function, also given below. The answer is given to be A^{0}=+\frac{q}{4\pi}\frac{1}{\mid\overline{x}\mid} Homework Equations A_{\mu}=\int...
  21. J

    Discovery of Maxwell field's spin

    After coming across an article by Schwinger where he tries to deduce the spin of a neutron, I started to wonder when the same thing was done for the photon... Specifically, I've been trying to locate "the" article where the spin of the electromagnetic field was theoretically determined to be 1...
  22. samgrace

    Maxwell equations' plane wave reduction

    Hello, I have been attempting to reduce Maxwell's equations to the forms shown in the image, by substituting the plane wave solutions for E and B of the wave equations back into Maxwell's equations, but I cannot find a way. Anybody know how to do this?
  23. S

    Quasi halbach magnet in ansoft maxwell

    hi who can help me to show field magnetic analysis of quasi halbach permanent magnet in ansoft maxwell? thanks
  24. A

    Why Isn't My Coil Simulation Achieving the Expected 8pT Signal in Maxwell?

    hello every one i want too simulate a coil with with Maxwell and transient solution type: this coil is in a paper and i want to simulate it i attach the coil properties. in this paper the dimension of coil is given such: diameret:12cm; length=84cm; moment=30a-m^2; construction= 16 turns...
  25. genxium

    [Special Relativity]Questions on Maxwell Equations' Derivation

    In Einstein's paper section 6 (I'm reading an English version online: https://www.fourmilab.ch/etexts/einstein/specrel/www/), it's said that one of the Maxwell Equations in frame K \frac{1}{c}\frac{\partial X}{\partial t} = \frac{\partial N}{\partial y} - \frac{\partial M}{\partial z}, where <X...
  26. G

    Derivative Maxwell boltzmann distribution

    Homework Statement i need to show that the peak of the maxwell Boltzmann distribution is equal to 1/2 kt. Homework Equations maxwell Boltzmann distribution according to modern physics 3rd edition by kenneth kramer. ill try to do my best with this N(E)= \frac{2N}{√∏}...
  27. A

    How to derive Maxwell stress-energy tensor

    The problem statement is: Assuming that we are in vacuum, and that the only work done between mechanical systems and electricity and magnetism comes from the Lorentz force, give a full, relativistic derivation of the Maxwell stress-energy tensor.
  28. E

    On what empirical laws are Maxwell equations based?

    For example, it could be said that the equation ∇*B= 0 is based on the observation that there are no magnetic monopoles. But for Faraday's law of induction, it is easy to derive it from other equations but it's hard to say on what empirical law it is based. Could it be said that it is itself...
  29. J

    Maxwell Relations: when are they valid?

    Hi, I have a question If I am not mistaken, the Maxwell relations of theromdynamics -----for example: ∂G/∂T) = -S ; ∂G/∂P) = V ----- are valid only for reversible processes. On the other hand, dG = ∂G/∂T)*dT + ∂G/∂P)*dP + ∑ μi dni is valid for any process. This means that dG = -SdT + VdP...
  30. C

    The Einstein Maxwell Action with sources

    The free field Einstein-Maxwell action is often states as $$S[A, g] = - \frac{1}{4}\int_M F^{\mu \nu} F_{\mu \nu}d^4 x + \int_M R(M) d^4x$$ where ##M## is the spacetime manifold ##F## is the field strength and ##R(M)## is the curvature of the spacetime manifold as dictated by the metric tensor...
  31. J

    ANSYS Maxwell Impedance Matrix

    Hello everybody, Three conductors are being simulated in Maxwell with a peak current. From Maxwell I extract the impedance matrix (3x3 matrix) of the three conductors. Conductors are placed on top of each other so there will be mutual inductances and resistances. The documentation on the...
  32. M

    What does Maxwell Capacitance/Potential Coefficent Means?

    Hi , I understand the equation and calculation and stuffs. But I can't really visualise/understand.What it does?.And I have questions like 1)Why make it symmetry to do the calculations? 1)Will the medium /Dielectric between conductor 1 and 2 affect C11/C22.Or only C12? Thanks for your time
  33. P

    How can I import a hysteresis material's loop into Ansoft Maxwell?

    hi my dear friends i face with a problem in ansoft maxwell; i want to import a hysteresis material's loop into maxwell's material s libraray but i cant!:( is there anyone who can help me? with the best wishes:) pedro
  34. T

    Maxwell Boltzmann Distribution

    I don't know how to integrate the Maxwell-Boltzmann distribution without approximation or help from Maple. Given the Maxwell-Boltzmann distribution: f(v) = 4\pi\left[\frac{m}{2\pi kT}\right]^{3/2}v^2\textrm{exp}\left[\frac{-mv^2}{2kT}\right] Observe the appearance of the Boltzmann factor...
  35. T

    Ansys Maxwell 2D Number of turns

    Hi, How do you define number of turns in a coil designed to operate at 100 kHz? Maxwell 2D axisymmetric treats the coils as a single conductor, how can we define number of turns. I would appreciate any response. Thanks
  36. T

    Maxwell Boltzmann Distribution

    I don't know how to integrate the Maxwell-Boltzmann distribution without approximation or help from Maple. Given the Maxwell-Boltzmann distribution: f(v) = 4*pi*[m/(2*pi*k*T)]^(3/2)*v^2*exp[(-m*v^2)/(2*k*T)] Observe the appearance of the Boltzmann factor exp[(-m*v^2)/(2*k*T)] with E =...
  37. TrickyDicky

    Did Maxwell truly follow Faraday's views in his theory?

    Although it is usually stated and taught that Maxwell developed pretty faithfully Faraday's views and experimental work into a mathematically solid theory, it is probably not widely known this is actually only partially correct, as Maxwell in fact changed much of Faraday's original theoretical...
  38. S

    ANSYS Maxwell 2D 2dof movement not single line translation

    Dear all, is there anybody knows how to set a 2 degree-of-freedom movement in ANSYS Maxwell 2D transient model? I have two fixed current-excited coils and a free magnet. The magnet should be able to move in a 2D space under the Lorentz forces. However, there are only translation and rotation...
  39. U

    How Do Maxwell's Equations Apply to Conductors?

    Homework Statement Part (a): Show wave equation for E can be reduced to that. Part (b): Show impendance of material is: Part (c): Find skin depth. Homework Equations The Attempt at a Solution I've got parts (a) and (b) solved, part (c) I've worked it out, but I'm not sure...
  40. M

    Basic Maxwell Speed Distribution Function

    Homework Statement Homework Equations The Attempt at a Solution I DO NOT NEED HELP WRITING THE PROGRAM! I'm just trying to figure out the basics behind it. Since this is an integral I will be solving this problem by using riemann sums. Where I'm having the most trouble is in the...
  41. S

    Maxwell Stress Tensor -> Force between magnets and perfect iron

    (this is not a hw) Assume you have a magnet of dimensions x_m, h_m, remanent flux density Br, and coercive field density Hc. The magnet is placed in a magnetic "C" structure (perfect iron) such that it is connected on one side but there is an airgap on the other side. xxxxxxxx xx... xx...
  42. U

    Help understanding proof involving Maxwell equation

    help understanding "proof" involving Maxwell equation I'm currently taking a course on mathematical methods for physics. (Like always I'm a bit confused about where exactly I should post these questions, should it go to the homework forum? ) anyway as I was reading the lecture notes I...
  43. P

    How to simulate a coil in Ansoft Maxwell 3d?

    Hello, I want to simulate a coil of a transformer in Maxwell (3D), but my problem is: the coil design is not a closed path. Imagine that you draw a ring and then you cut part of it. You get something like a "letter C". In these two terminals I`m going to put an excitation (100A, for...
  44. G

    The Maxwell equation and the Fourier Spectrum of an Electric Field

    Hi. I have an electric field E(r) which can be equivalently characterized by its Fourier spectrum \tilde{E}(k) through E(r)\propto\int\tilde{E}(k)exp[ik\cdotr]dk The Maxwell equation states that in a homogeneous and isotropic medium ∇\cdotE=0 So, applying this equation to my Fourier...
  45. K

    Simple Derivation Maxwell Equations

    Homework Statement Derive the 2 divergence equations from the 2 curl equations and the equation of continuity. Homework Equations ∇°D=ρ ∇°B = 0 ∇xE = -∂B/∂t ∇xH = J + ∂D/∂t ∇°J = -∂ρ/∂t (equation of continuity) The Attempt at a Solution 1)∇xE = -∂B/∂t ∇°(∇xE) = ∇°(-∂B/∂t)...
  46. P

    Symmetry of gravitational field to electric field and Maxwell equation

    Symmetry is an important way to find new physical laws according to Feynman. The equation that describes the electric field and the gravitational field are quite similar. Since the electric and magnetic fields are well defined by the Maxwell equations could it be possible, by symmetry, that...
  47. A

    What is the physical meaning of Maxwell equations

    hello, Help me to answer these questions: Give the physical meaning of Maxwell equations (equations in the general case). div D=ρ div B=0 rotE=-∂B/∂t rotH=∂D/∂t+J i have second question: What is the difference between conduction current and displacement current? thankyou
  48. Y

    I deriving this Maxwell relation

    Homework Statement By considering small changes in enthalpy, and using the central equation, derive the Maxwell relation \left (\frac{\partial S}{\partial V} \right )_{T}= \left (\frac{\partial p}{\partial T} \right )_{V} Homework Equations H=U+pV dU=TdS-pdV The Attempt at a...
  49. M

    How do the Maxwell equations transform under a time reversal?

    Guys, Let me ask you the silliest question of the year. I am looking at the Maxwell equations in their standard form. No 4-dim potential A, no Faraday tensor F, no mentioning of special relativity - just the standard form from a college-level textbook. I know that the eqns are NOT...
  50. J

    Solving Maxwell Boltzmann Random Number Problem

    Hello, i was given 100 x,y random numbers, and was asked to find: Using vmin = 0, 5 *vmax as bounds on the x-axis, and P(0) = 0, P(vmax) as bounds on the y-axis, generate a set of velocities vi where i = 1,...,n producing a set of random numbers from a distribution function. (When such a...
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