All Questions
99
questions
1
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471
views
Is it possible to find potential difference between two point in case of induced EMF created by a time-varying magnetic field?
Q: There is a uniform time varying magnetic field in a circular region as shown in the figure. find out the potential difference across 2 point along an elliptical path as shown in figure.
As far as ...
- 1,022
0
votes
1
answer
236
views
How to find potential difference between two points in a loop in case of motional emf? [closed]
Given below is a question in my physics textbook.
A rectangular frame of wire abcd has dimensions 32 cm×8.0 cm and a total resistance of 2.0 Ω. It is pulled out of a magnetic field B=0.02 T by ...
- 1,022
0
votes
1
answer
275
views
Electric field inside a box with conducting walls
A box made of 6 conducting plates as sides has vacuum inside. The plates are joined by an insulating layer, allowing for different plates to be set to different potentials. Initially, all sides are ...
- 59
1
vote
1
answer
190
views
Induced electric field ambiguities
I am currently in highschool and don't know maxwell's equations much. However I do know about Faraday's law and recently we were taught about Electromagnetic Induction. I am having a few problems in ...
- 73
3
votes
1
answer
435
views
Heaviside-Feynman formula derivation
I want to discuss derivation of Feynman-Heaviside formula.
The topic has already been discussed here but I can not put there any question that's why I'm making new post.
Deriving Heaviside-Feynman ...
1
vote
0
answers
58
views
How do I know if a solution of Maxwell Equations is caused solely by the charges?
My question is very general and it isn't limited to the system that I calculated the fields. I need a general answer or a particular answer for my problem. I found two fields $\mathbf E,\mathbf B$ ...
- 277
1
vote
2
answers
697
views
Motion of charged particle in uniform magnetic field and a radially symmetric electric field
This question posted by me on MSE talks about a physics problem. This is what it was: (I hope someone can help me with this)
Consider a region of 2-dimensional space with a uniform magnetic field of ...
- 121
4
votes
2
answers
981
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Find the electric field from a ring of charge along its axis without using symmetry
I am more than happy understanding how to find the equation for the electric field for a ring of charge along its centre axis (see Electric Field: Ring of Charge). But in every explanation I have seen ...
- 131
2
votes
1
answer
372
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Does substituting the Lorentz-transformed scalar and vector potentials into the $E$-field formula yield the correct Lorentz-transformed $E$-field?
If we switch from one inertial frame to a different inertial frame with a relative velocity of $\mathbf{v}$, we could transform the scalar and vector potentials thusly:
$$\varphi' = \gamma \left( \...
- 129
2
votes
1
answer
278
views
Why the Dielectric strength decrease with the frequency?
According to Wikipedia, the dielectric strength decrease with the frequency:
Is it possible to explain what is happening when the frequency increase ? I try to understand how to generate an arc ...
- 177
-1
votes
1
answer
329
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Displacement of electron in magnetic and electric field, verification of one logic
I have solved this problem, but just need verification of my thinking about this as well as the question book has used full page for solution(using simple harmonic) but I had done it in a rather ...
- 516
1
vote
2
answers
60
views
Calculating at what time electromagnetic wave reaches highest and lowest value? [closed]
I thought electromagnetic waves travel forever and that the peak (both positive and negative) only decreases when the magnitude decreases cus of attenuation but it would never reach 0?
How is it ...
- 13
-1
votes
1
answer
37
views
Conducting wire swinging in magnetic field
Imagine a situation where a conducting wire is swinging around one of its ends, in a uniform magnetic field that is perpendicular to the plane of rotation, and i want to find the potential that is ...
- 99
2
votes
0
answers
318
views
The $z$-component of the electric field vector [closed]
It is asked to find the wave equation for the z-component of the electric field vector by using Maxwell’s equations in free space.
Here is my work -
In free space we have the following relation ...
- 55
0
votes
2
answers
228
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Null electric field at infinity? How? [closed]
Suppose there are two charges (4uC each) fixed in the horizontal axis. One is in x=0 and the other in x=8m.
I've obtained the electric field:
$E=-k\cdot4\mu C \cdot [\frac{1}{x^2}+\frac{1}{(x-8m)^2}]...
