Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with electrostatics
Search options not deleted
user 179366
Electrostatics is concerned with the electrical fields and scalar potentials of stationary electrical charges and charge distributions. Use this for questions about electromagnetic situations in which currents and magnetic fields are absent, otherwise use the [electromagnetism] and/or [magnetic-fields] tags.
1
vote
Accepted
Negative electrostatic potential energy interpretation
EPE is the energy required to gather all ions from infinity to create the crystal. If this energy is negative, than the opposite: "taking the crystal apart and sending all ions to infinity" requires …
- 1,528
4
votes
Why there is zero potential between two opposite charges of equal magnitude?
In this case there is one specific path all the way from infinity to the mid point, the midperpendicular between charges, which exhibits no forces parallel to the path.
Along this path, work obvious …
- 1,528
4
votes
Accepted
Electric potential just outside a spherical shell
You may be somewhat confusing electrical field and electrical potential. But in both cases, the flaw in your reasoning is the same: the distance from the infinitesimal charge may be infinitisimal smal …
- 1,528
2
votes
What is the direction of current density?
Indeed resistivity is usually a scalar and current is along the electric field.
When an electric field is applied to the conductor, charges will flow in response to the field. If the conductor is iso …
- 1,528
2
votes
Fields $E$, $D$ and polarizaton $P$
You define $E$ as an external field but $E$ in your equation is the final internal field. The final internal field is lower than the field expected if no dielectric was present. So in the standard cas …
- 1,528
0
votes
Understanding Electric potential
First, a mathematical intuition:
The fact that the line integral between any two points in space is independent of the path implies that you can assign each point in space a number ("potential") and …
- 1,528
6
votes
Accepted
Electric Potential Energy of a charged conductor
The equation $voltage=\frac{ energy}{ charge}$ or $V=\frac{E}{Q}$ should be interpreted as follows: Given a voltage of $V$, you need to invest energy $E$ to move charge $Q$ across this voltage. When y …
- 1,528
2
votes
Three questions about capacitance
Aside from the typical capacitor made of two conductors and explained in @DakkVader response, one often encounters a single conductor holding charge.
In that case, potential difference is measured b …
- 1,528
3
votes
Does a grounded conductor have zero charge?
Not necessarily. For example, if there is another nearby charge, the conductor may need to gain charges so as to nullify its potential.
- 1,528
5
votes
Why are the two outer charge densities on a system of parallel charged plates identical?
Count the surfaces from left to right: S1,S2,S3...,Sn. Each surface generates a symmetric field (left and right). Hence total field left of S1 (E0) is equal to total field right of Sn. Field between S …
- 1,528