Movatterモバイル変換

Question 1

1vote

0answers

30views

How does surface dipoles cause negative electron affinity in hydrogen terminated diamond?

I am currently researching about hydrogen terminated diamond, in this paper https://doi.org/10.1103/PhysRevLett.81.429 , it is mentioned due to the dipole layer at hydrogen terminated diamond surface, ...

Aditya Das Utsha

11

askedNov 5 at 7:03

Question 2

1vote

0answers

28views

What symmetries constrain the magnetic dipole moment to be proportional to angular momentum?

While working on calculations regarding dipole moments in quantum dots, I noticed an interesting difference between the form of magnetic and electric dipole moment operators in quantum mechanics (bold ...

Dev

327

askedOct 17 at 13:44

Question 3

0votes

1answer

119views

Problem with vector calculus - electric field from a dipole

While deriving the electric field from a dipole source, from the notes I am following I am required to process the following vector operation:$$\nabla \left(\frac{e^{jkr}}{r}\mathbf n\cdot \mathbf p\...

edoverg

27

askedSep 27 at 20:25

Question 4

-1votes

3answers

247views

Why are magnetic fields that shape?

When you place iron filings around a bar magnet, they take an arrangement which ends up looking like this:But I'm having trouble understanding where the strange shape of these field lines comes from;...

Flamethrower

571

askedSep 18 at 8:37

Question 5

2votes

0answers

65views

Different fields produced by balls of uniform electric vs magnetic dipoles

An electric dipole and a magnetic dipole produce the same field (only difference is $1/\varepsilon_0$ vs $\mu_0$). But a solid ball with a uniform dipole density produces different fields inside the ...

Bichidian

21

askedSep 12 at 22:40

Question 6

0votes

2answers

175views

Comparison of Equation 6.10 and 5.85 in Introduction to Electrodynamics (4th edition) by Griffiths

I am confused about equation 6.10 in Introduction to Electrodynamics (4th edition) by Griffiths.Using $\mathbf{R} \equiv \mathbf{r}-\mathbf{r}'$ (instead of his script $r$), equation 6.10 describing ...

physicist

9

askedSep 2 at 17:20

Question 7

3votes

0answers

109views

1/3 factor explanation for $\chi^{(1)}(\omega)$ in linear response theory, from Boyd's Nonlinear optics

The quote is from Robert Boyd's Nonlinear Optics, Section 3.5.1- Linear Response Theory, Pg. 165.Let us first specialize our results to the case of an isotropic material. As a consequence of ...

Alan Whitteaker

435

askedAug 11 at 12:35

Question 8

1vote

1answer

204views

The Lagrangian of a moving electric and magnetic dipole

I am reading Chapter 24 of Modern Electrodynamics by Zangwill. I have a question about example 24.2 (a) even after reading the solution.The statement of the problem:A neutral and point-like particle ...

YqL

79

askedJul 25 at 16:03

Question 9

2votes

1answer

158views

Are there are general bounds on how the radiated powers for two source configurations can combine?

Suppose you have some electric source configuration $(\rho_1({\bf x}, t), {\bf J}_1({\bf x}, t))$ (satisfying the continuity equation) that produces a total (time-averaged and angle-summed) radiated ...

tparker

52.3k

askedJul 17 at 3:26

Question 10

0votes

2answers

172views

Force on a dipole due to a point charge kept at a finite and equal distance from the charges of dipoles

Why isn't Force on a dipole due to a point charge kept at a finite and equal distance from the charges of dipoles equal to zero?Question-The electric field due to point charges (positive) are ...

T Es

99

askedMay 24 at 3:26

Question 11

0votes

1answer

104views

Problems with Energy Conservation and Dipole Radiation

The electric field strength of a rotating electric dipole in the far-zone ($d \gg \lambda \gg a$) scales as $1/d$ (Eq 9.18 of Griffiths). Hence, the rate of work done on a second dipole sitting in the ...

Sharplie12321

69

askedApr 3 at 17:01

Question 12

2votes

0answers

90views

Why is quadrupolar relaxation so much stronger than dipolar?

In the book "Nuclear Spin Relaxation in Liquids: Theory, Experiments, and Applications" it is stated that"For S ≥ 1 spins, the quadrupolar interaction is usually much stronger than ...

Luca

105

askedMar 31 at 16:17

Question 13

1vote

0answers

65views

Energy of a coil in an external magnetic field

Imagine a coil with constant current flowing around it in a homogeneous external magnetic field. (For simplicity, let's say the coil has only one winding, i.e. it is a simple loop.) Now, if I am doing ...

schtandard

339

askedMar 27 at 16:41

Question 14

0votes

1answer

98views

Magnetic flux lines and strength versus shape of a magnet

Imagine a rod magnet $20\,\text{mm}$ long and with a diameter of $10\,\text{mm}$. The ends of such a magnet are normally $90^\circ$ to it's axis/length.However, how will the flux lines from N to S ...

runedegard

1

askedMar 23 at 20:11

Question 15

1vote

2answers

230views

How dipole antenna radiate electromagnetic radiation?

I was reading about how accelerated cahrges radiate electromagnetic waves, and i found the most known application on it was the dipole antenna, which was by applying an alternating voltage signal the ...

Fadi

77

askedMar 22 at 15:12

Movatterモバイル変換

Stack Exchange Network

Questions tagged [dipole]

How does surface dipoles cause negative electron affinity in hydrogen terminated diamond?

What symmetries constrain the magnetic dipole moment to be proportional to angular momentum?

Problem with vector calculus - electric field from a dipole

Why are magnetic fields that shape?

Different fields produced by balls of uniform electric vs magnetic dipoles

Comparison of Equation 6.10 and 5.85 in Introduction to Electrodynamics (4th edition) by Griffiths

1/3 factor explanation for $\chi^{(1)}(\omega)$ in linear response theory, from Boyd's Nonlinear optics

The Lagrangian of a moving electric and magnetic dipole

Are there are general bounds on how the radiated powers for two source configurations can combine?

Force on a dipole due to a point charge kept at a finite and equal distance from the charges of dipoles

Problems with Energy Conservation and Dipole Radiation

Why is quadrupolar relaxation so much stronger than dipolar?

Energy of a coil in an external magnetic field

Magnetic flux lines and strength versus shape of a magnet

How dipole antenna radiate electromagnetic radiation?

Hot Network Questions

Subscribe to RSS