List questions from electromagnetism

Published on 21 Sep 2021 - 6:27

205

Views

Wave equation under Galilean transformation

Published on 23 Feb 2026 - 11:37

128

Views

How to solve $\sum_{n=-\infty}^\infty\frac{y^2}{[(x-n\pi)^2+y^2]^{3/2}}$?

Published on 22 Sep 2021 - 20:11

76

Views

Variational derivation of all covariant Maxwell's equations?

Published on 24 Feb 2026 - 3:50

179

Views

Prove $\nabla(\frac{\vec{r}}{r}.\vec{r'})=-\frac{\vec{r}}{r}\times\left(\frac{\vec{r}}{r}\times\frac{\vec{r'}}{r}\right)$

Published on 01 Oct 2021 - 14:03

1.1k

Views

When does zero divergence imply a vector potential exists?

Published on 09 Oct 2021 - 19:10

107

Views

Formula for the Maxwell Stress tensor in arbitrary coordinates

Published on 12 Oct 2021 - 14:20

35

Views

Deriving force between continuous distributions of two volume charges without using infinitesimals

Published on 26 Oct 2021 - 9:46

76

Views

$i = \frac{dq}{dt}$ implies $\Delta q = i \Delta t$? Incorrect mathematics used as some kind of hand-wavy justification for an engineering equation?

Published on 04 Nov 2021 - 3:28

45

Views

Perpendicular complex-valued vectors

Published on 08 Nov 2021 - 7:06

80

Views

Modelling the magnetic field of a conventional tokamak

Published on 09 Nov 2021 - 14:25

50

Views

Is there any condition under which $\nabla\cdot F=0$ implies $F=0$?

Published on 16 Nov 2021 - 5:20

132

Views

Line and Surface Integral with the Dot Product replaced with a Cross Product

Published on 22 Nov 2021 - 14:19

80

Views

Do these two Green's functions satisfy the Lorenz gauge condition?

Published on 30 Nov 2021 - 13:12

739

Views

How do we compute Hodge duals?

Published on 06 Dec 2021 - 20:07

List Question

Why is the Kaluza-Klein ansatz the natural choice?

Wave equation under Galilean transformation

How to solve $\sum_{n=-\infty}^\infty\frac{y^2}{[(x-n\pi)^2+y^2]^{3/2}}$?

Variational derivation of all covariant Maxwell's equations?

Prove $\nabla(\frac{\vec{r}}{r}.\vec{r'})=-\frac{\vec{r}}{r}\times\left(\frac{\vec{r}}{r}\times\frac{\vec{r'}}{r}\right)$

When does zero divergence imply a vector potential exists?

Formula for the Maxwell Stress tensor in arbitrary coordinates

Deriving force between continuous distributions of two volume charges without using infinitesimals

$i = \frac{dq}{dt}$ implies $\Delta q = i \Delta t$? Incorrect mathematics used as some kind of hand-wavy justification for an engineering equation?

Perpendicular complex-valued vectors

Modelling the magnetic field of a conventional tokamak

Is there any condition under which $\nabla\cdot F=0$ implies $F=0$?

Line and Surface Integral with the Dot Product replaced with a Cross Product

Do these two Green's functions satisfy the Lorenz gauge condition?

How do we compute Hodge duals?

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