Tagged Questions
0
votes
1answer
61 views
Find the dielectric constant of the medium?
Two point charges a distance $d$ apart in free space exert a force of $1.4\times10^{-4}N$. When the free space is replaced by a homogeneous dielectric medium, the force becomes $0.9\times10^{-4}N$. ...
2
votes
3answers
105 views
Is electron velocity at induction higher than in a wire?
When looking to the electrostatic induction on a microscopic level, do the electrons really move with high velocities or they move like when a current passes through the wire (slowly).
2
votes
3answers
121 views
Explanation on the resulting forces of two positive point charges
Why will the resulting force lines of two positive point charges be like this:
I would expect this:
0
votes
0answers
107 views
How do I find the force on the charged sphere due to a dipole sitting inside?
I have a dipole sitting inside a charged sphere i.e. at the centre of the sphere. As far as I can see the force on the Dipole is zero because the external electric field on the dipole at $r=0$ is $0$. ...
1
vote
1answer
419 views
The formula of the force exerted on an electric dipole by non-uniform electric field
When an electric dipole of moment $\mathbf{P}$ is located in a non-uniform electric field $\mathbf{E}$, there is an net force exerted on it.
However, the formula of the force in some books is read ...
-1
votes
1answer
194 views
Find the distance of a third charge [closed]
The problem I am having is:
Two positive charges (+8.0 mC and +2.0 mC) are separated by 300 m. A third charge is placed at distance r from the +8.0 mC charge in such a way that the resultant electric ...
0
votes
1answer
146 views
Force due to combination of free space and dielectric
I will make a generalized form of my question.
There are two point charges $q$, $x$ distance apart.
And there is a dielectric slab of thickness $t$ and of dielectric constant $K$.
Should the force ...
3
votes
2answers
455 views
Electrostatic Pressure Concept
There was a Question bothering me.
I tried solving it But couldn't So I finally went up to my teacher asked him for help . He told me that there was a formula for Electrostatic pressure ...
1
vote
1answer
320 views
Trajectories using Polar Coordinates
Once I asked my teacher how to find the trajectory of any particle that is acted upon any force.(Generally)
He Told me that I couldn't do it as I did not know polar coordinate geometry as of then but ...
4
votes
3answers
955 views
“Find the net force the southern hemisphere of a uniformly charged sphere exerts on the northern hemisphere”
This is Griffiths, Introduction to Electrodynamics, 2.43, if you have the book.
The problem states Find the net force that the southern hemisphere of a uniformly charged sphere exerts on the ...
3
votes
1answer
142 views
What force is acting on the charge in the dielectric?
For example I have a dielectric solid with a small charged ball in it. And I have external electric field $E$. So what force is acting on this ball?
The field in dielectric is $\frac{E}{\epsilon}$, ...
7
votes
2answers
1k views
Tension in a curved charged wire (electrostatic force) - does wire thickness matter?
Consider a conducting wire bent in a circle (alternatively, a perfectly smooth metal ring) with a positive (or negative) electric charge on it. Technically, this shape constitutes a torus. Assume ...
