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Question 1

5votes

0answers

152views

Structure of Higgs potential

The Higgs potential is written as$V(\phi) = -\mu^2 |\phi|^2 + \lambda^2 |\phi|^4$,where $|\phi|^2 = \phi^\dagger \phi $ and $ \phi $ is a complex scalar doublet.My question is: why do we not ...

Martin

51

askedNov 20 at 10:04

Question 2

1vote

1answer

137views

About the vector potential

I have a question that is probably trivial concerning the vector potential used in electromagnetism. When solving the wave equations for the vector potential $\mathbf{A}$, we are essentially ...

Upax

242

askedNov 16 at 19:24

Question 3

0votes

0answers

27views

What is the equation for the change in electric potential due to a field generated by a point charge? [duplicate]

I'm a current AP Physics 2 high school student with a test in a few days; a swift reply would be very much appreciated. Thank you in advance.My question is concerning the formula for the change in ...

theFavorite

63

askedNov 11 at 0:59

Question 4

1vote

2answers

99views

Why does the Poisson equation help to compute the electric field $E$ when the integral is intractable?

Currently I am reading through Griffiths Introduction to Electrodynamics and I am in chapter 3.1 about Laplace's equation.The author explains that our aim is to compute the electric field given a ...

metare stephanois

13

askedNov 5 at 10:30

Question 5

-1votes

2answers

59views

How does electric potential vary between two positive test charges? [closed]

If you plot a graph showing the variance of electric potential between two charges, does the middle have a maximum or minimum electric potential and why?

KN307

3

askedNov 3 at 9:18

Question 6

0votes

3answers

83views

When do we consider that grounding the conductor makes the potential zero?

When do we consider that grounding the conductor makes the potential zero?I was recently seeing why is the outer charge of the system of grounded conducting plate becomes zero, and the reason given ...

Aditya

23

askedOct 30 at 15:06

Question 7

-1votes

1answer

99views

Question about Schrödinger equation with scalar and vector potentials from Sakurai

This is from page 127 of Sakurai QM:How did they obtain this result? I understand the factor comes from the Hamilton on the LHS, but how were they able to pull out the factor out of the bra-ket like ...

ConquestAce

7

askedOct 23 at 7:06

Question 8

1vote

1answer

57views

Potential energy gradient of two masses

Say there are two masses , each of mass m; moving along the x axis under the influence of mutual gravitational force. No other external forces are there on them and hence center of mass does not ...

Rohit

13

askedOct 17 at 18:02

Question 9

0votes

1answer

135views

Griffith, Electrodynamics, 4th edition, Example 4.7

I am reading the Example 4.7. in the Griffith's Electrodynamics book and stuck at some statements.Example 4.7. A sphere of homogeneous linear dielectric material is placed in an otherwise uniform ...

Plantation

389

askedOct 7 at 12:43

Question 10

1vote

2answers

157views

Why is the Electric Potential Between Two Oppositely Charged Points Zero? [closed]

Assuming two charges of +5C and -5C are placed at points A and B respectively, why is the potential between them zero if the electric field between them is constant and non-zero?It makes sense if you ...

Reylal

11

askedSep 24 at 7:27

Question 11

0votes

0answers

57views

How to obtain $ϕ(a)$ to solve a multi-scale matter density contrast equation in cosmological perturbation theory?

I have derived the equation for the evolution of the matter density contrast $\delta_M(a)$:$$\delta_M''(a) + \left(\frac{4}{a} + \frac{H'(a)}{H(a)}\right)\delta_M'(a)+ \frac{3 \phi'(a)}{a}- \frac{...

SHAFQAT ALI

1

askedSep 18 at 17:18

Question 12

5votes

1answer

733views

Why's the Electric Field intensity within a hollow sphere zero?

I have read in my physics book that in the case of a conductive hollow sphere, containing an amount of charge on its surface, the electric field intensity inside it will be zero, and as a result, the ...

Raian Janik

53

askedSep 16 at 14:03

Question 13

1vote

1answer

243views

Connection between magnetic field $\bf B$ and vector potential $\bf A$ in Griffiths

In Griffiths' Electrodynamics (3rd Ed.) p. 240 there is a triangle of relations between $\bf{A}, B$ and $\bf J$ with an indication of the vector operations that link these quantities in both ...

daniel

696

askedSep 3 at 20:49

Question 14

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 15

3votes

2answers

179views

Non-existence of bound states for $V(x)=-\alpha/x^2$ in 1D [closed]

I am trying to determine whether a potential of the form$$V(x) = -\frac{\alpha}{x^2}$$admits bound states in 1D quantum mechanics. My guess is that it does not: by dimensional analysis I cannot ...

EdoRoundTheWorld

409

askedAug 29 at 21:53

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Questions tagged [potential]

Structure of Higgs potential

About the vector potential

What is the equation for the change in electric potential due to a field generated by a point charge? [duplicate]

Why does the Poisson equation help to compute the electric field $E$ when the integral is intractable?

How does electric potential vary between two positive test charges? [closed]

When do we consider that grounding the conductor makes the potential zero?

Question about Schrödinger equation with scalar and vector potentials from Sakurai

Potential energy gradient of two masses

Griffith, Electrodynamics, 4th edition, Example 4.7

Why is the Electric Potential Between Two Oppositely Charged Points Zero? [closed]

How to obtain $ϕ(a)$ to solve a multi-scale matter density contrast equation in cosmological perturbation theory?

Why's the Electric Field intensity within a hollow sphere zero?

Connection between magnetic field $\bf B$ and vector potential $\bf A$ in Griffiths

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

Non-existence of bound states for $V(x)=-\alpha/x^2$ in 1D [closed]

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