All Questions
45
questions
0
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1
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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
-3
votes
2
answers
7k
views
How to determine the angular velocity of a particle with mass $m$ and charge $q$ in a constant B field? [closed]
$\textbf{PROBLEM:}$
A particle with mass $m$ and charge $q$ moves in a constant magnetic field $B$. Show that, if the initial velocity is perpendicular to $B$, the path is circular and the angular ...
1
vote
1
answer
337
views
Why can't I measure electric potential from source to point according to this formula
The formula for electric potential of points A and B in the presence of an electric field due to a point charge where $R_a$ and $R_b$ are the distances from source to point A and B respectively is:
$${...
- 163
0
votes
1
answer
460
views
How do I determine the electric charge on two (initially discharged) spheres after an impact with a charged sphere?
This is the first part of a problem on my book:
Two identical conducting spheres, initially discharged, of mass $ m = 0.5 \ kg $ come in contact, in consecutive moments, with another sphere, ...
1
vote
1
answer
48
views
a charged particle path [closed]
A particle of mass $m$ and charge $e$ enters a homogeneous and stationary electric field $E$ with velocity $v_0$ perpendicular to the direction of the field.
Calculate the particle's path?
What does ...
- 145
0
votes
1
answer
3k
views
Using Cosine Law to Find Net Electric Force on Charge Always Results in Positive Number?
In order to determine the net force other charges have on a particular charge, you must take into account each individual electric force between the charge and the charge of interest. However some of ...
- 21
1
vote
2
answers
423
views
Description of the motion of the COM of a system of charged particles moving in a magnetic field
I recently came across a problem where an electrically neutral particle is at rest in a uniform magnetic field. The particle now splits into two charged particles of equal mass $m$; charge and mass ...
- 2,077
0
votes
1
answer
908
views
Question regarding 2 conducting spheres connected by a long fine line (electric potentional)
I'm having a bit of trouble understanding a pretty simple issue.
Assuming I have 2 conducting spheres uniformly charged connected by a long fine line (as shows in the added photo) and im being asked ...
- 137
0
votes
1
answer
135
views
How does this particle behave in the magnetic field?
I have the above question and I have though about it every way and can't seem to find out. So what I have concluded (ignore the answers on the img) Is that the force is on the z axis because the cross ...
- 23
1
vote
0
answers
2k
views
Electric potential on a uniformly charged tube
A hollow cylinder, with no top or bottom, of radius $R$ and length $L$ is uniformly charged with density $\sigma>0$. I have to find the point on space where a point charge $q>0$ has to be drawn ...
- 31
0
votes
1
answer
2k
views
Electric potential difference from electric field of isolated spherical conductor
I'm wondering if my train of thought is correct. Say you have Point $A$ which is $A$ distance away from the center of an isolated spherical conductor, and Point $B$ which is $B$ distance away from the ...
- 149
-6
votes
1
answer
6k
views
Are dc and ac currents produce electric field? [closed]
I have four different situation and i want to learn what kind of field (electric or magnetic) each produces and which produces electomagnetic waves?
1)dc current flow in a conductor
2)ac current ...
- 25
9
votes
4
answers
668
views
Distribution of point charges on a line of finite length
How will $N$ freely moving charges confined to a line with length $L$ be distributed? What are their equilibrium positions?
- 4,194
13
votes
1
answer
560
views
How can I find the position of an image charge when the boundary is parabolic or hyperbolic?
If the position of some charge $Q$ is known, the boundary condition is $u=0$ on some parabolic surface, and we know the image charge has its electric volume of $Q'$, then how can I determine the ...
- 147
3
votes
1
answer
1k
views
Electric Field due to a charged sphere
Suppose we have a spherical surface with a surface charge density varying as $cos(\theta)$. Apparently one can find the electric field both outside and inside such a spherical surface by superposing ...
- 33