All Questions
39
questions
1
vote
1
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Magnetic force on a triangular loop
This triangular loop has sides of length $a$ and is $d$ distance away from a straight long conducting wire. The current I on the long wire moves from left to right and the current i on the triangular ...
- 25
0
votes
1
answer
160
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Vector question on the relation: $\vec{F}=q\vec{E}+q\vec{v}\times\vec{B}$
The force on a charged particle due to electric and magnetic fields is given by $\vec{F}=q\vec{E}+q\vec{v}\times\vec{B}$. If $\vec{E}$ is along the $X$-axis and $\vec{B}$ asking the $Y$-axis, in what ...
- 185
0
votes
0
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118
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From Lagrangian of Electromagnetic field to the Lorentz force? [duplicate]
The dynamics of a charged particle with velocity $\textbf{v}$ in electromagnetic field is dominated by the Lorentz force
$$\textbf{F} = q(\textbf{E}+{\textbf{v} \times \textbf{B}}), \tag{1}$$
and ...
- 1,757
3
votes
2
answers
2k
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What does "point of application of force" mean in the given context?
I faced a particular conceptual doubt while solving a textbook problem. I will initially write the complete question in my textbook and then try to boil it down to a single conceptual doubt so that it ...
user131786
2
votes
2
answers
2k
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What is the physical meaning of the zeroth component of the Minkowski force 4-vector?
In David Griffiths' Intro to Electrodynamics, section on ED and relativity, he poses a simple problem regarding the zeroth component of the Minkowski force 4-vector for a charge $q$ moving with ...
-1
votes
1
answer
69
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Work required to bring particle towards grounded plane
I have a quick question:
If you suspend a charge $q$ above a grounded conducting plane a distance $z$ above the plane, you get that the charge induces a negative surface charge on the conductor. The ...
- 1,023
4
votes
1
answer
6k
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Harmonic motion of negative charge between two positive ones [closed]
I have to prove that a negative charge will execute an harmonic motion when placed in the line that separates two positive charges $Q$. (The negative charge $-q$ will not be placed on the center).
I ...
- 501
3
votes
0
answers
206
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Confusion in reaction force of Ampere's Force Law [closed]
I am reading Maxwell's "A Treatise on Electricity and Magnetism" and I have some confusion in the following pages:
The element ds is resolved into its components $\alpha$ and $\beta$;and the element ...
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1
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0
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174
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What is a simple model to find the jump height for the Thomson's Jumping Ring experiment?
I'm trying to devise a basic formula that could give a rough estimate for the jump height reached in the Thomson's Jumping Ring experiment, as detailed here.
However, it's pretty difficult as most ...
- 11
0
votes
1
answer
209
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Force from a large conducting plate [closed]
How can I find the distance to a test-charge, hoovering below a conducting plate? Newtons laws applies.
$$
$$
According to this information, I conclude that the force is equal zero. It is not moving....
- 31
0
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1
answer
230
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Deriving Konopinski's Operational Definitions of Scalar and Vector Potential
In "What the electromagnetic vector potential describes", E. J. Konopinski asserts:
Operational definitions of $\phi$, $\mathbf{A}$ should now be expected to stem from the equation of ...
- 1,357
0
votes
1
answer
100
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Calculating force repulsive between a line segment and a point [closed]
As shown in the diagram below, let there be a line segment $L$ and a point $p$ such that they both repel each other electrically. Let $\vec{v} = \vec{p} - \vec{q}$ be the vector from $p$ to the point ...
- 227
1
vote
1
answer
2k
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Repulsive Force between two Electromagnets
This question might seem a bit too basic(or advanced!), but it is the one to which I'm really desperate to find a simple enough explanation and solution.
Ok, So here's the problem,
I have two ...
- 37
1
vote
1
answer
3k
views
Force between two solenoids
How does one calculate the magnetic force between two coaxial solenoids, placed in a way their currents are in the same sense? There is a simple way to treat both as dipoles and then calculate the ...
- 467
2
votes
1
answer
1k
views
Relativistic Lorentz Force with constant, perpendiuclar, and uniform E and B fields
I am trying to solve the following problem from the Fundamentals of Plasma Physics by Bittencourt (Problem 2.7):
Analyze the motion of a relativistic charged particle in the presence of crossed ...
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