# Questions tagged [coulombs-law]

A fundamental and empirical law quantifying the electrostatic force between two charges.

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### Computing the potential difference between two points using $\ \vec{E} \>=(xî + yĵ + zk̂)\frac{kQ}{(x^2 + y^2 + z^2)^{3/2}}$ [closed]

The potential difference between two points, A to B, is given to me as $$ΔV= -\int\limits_A^B \vec{E} \cdot d\vec{r}\ .$$ Since this is my first time seeing something like this as a first-year ...
37 views

### Why electric potential can be evaluated by conservative electric field?

The definition of electric field is following: The electric field is defined at each point in space as the force per unit charge that would be experienced by a vanishingly small positive test charge ...
55 views

### Attractive or repulsive force between two statically charges plates [duplicate]

So I'm trying to calculate some mechanics for an electrostatic attraction/repulsion system and I want to make sure that I'm using the correct numbers. I did a bunch of research on my own and I think I ...
1 vote
45 views

### Calculating electric field produced by spherical shell [closed]

I'm having trouble solving this problem. Find the electric field a distance $z$ from the center of a spherical surface of radius $R$ that carries a uniform charge density $\sigma$. In here, $R>z$. ...
45 views

### Potentials of two near conductors

When two conductors (let's say spherical) of charges $q_1$ and $q_2$ and radii $r_1,r_2$ respectively are brought and connected by a metal rod,we know that flow of charge occurs unless potentials are ...
74 views

### A question about Coulomb's law for one moving and one stationary charge

let one charge is moving and another charge is stationary (compulsory). Then the electric force between them can be calculated by coulomb's law?
79 views

### Definition of Coulomb's law

In the article about Coulomb's law There is following sentence: Coulomb's law is an experimental law of physics that calculates the amount of force between two electrically charged particles at rest. ...
66 views

### Limitation of Coulomb's law

The Coulomb's law is an expertimental law which calcuates the electrostatic force between distinct two electrically charged point particles (point charge) at rest. And Point particle doesn't take up ...
260 views

### Why do gravity and electricity sometimes obey inverse square laws over the same distance scale?

Is this a chance mathematical coincidence or is there a good physical explanation for it? 1 vote
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### Validity of coulombs law for a charge in motion [duplicate]

If there is a charge $Q$ kept firmly at rest and another charge $q$ is brought in the vicinity of $q$,it's obvious that $q$ will accelerate towards $Q$. Now,when we say that coulombs law is not ...
1 vote
38 views

### Electromagnetic influences in electric field

Let us imagine a charge $q$ in space. At each point in space,there is an electric field vector associated with it. Now we start moving the charge in a direction. We know that electromagnetic ...
29 views

### Dipole formation in electrostatic induction

Let's bring a positively charged rod near a conductor. Now since some electrons in outer shells are not strongly bound to atoms,they will get to the side near the rod. But why does it mean that dipole ...
1 vote
68 views

### Charge distribution on an infinitesimally thin, elliptical conducting thread

Assume an elliptical conducting thread, which is positively charged. Although the thread is considered to be very thin, its stiffness is great enough in order not to allow the Coulomb's forces between ...
1 vote
31 views

### Static condition of surface charges

We know that when charge is supplied to a conductor,they rearrange themselves on the surface thus making a static equilibrium condition. Let's suppose we have $+2e$ charge on a plane sheet conductor. ...
1 vote