bond - What is charge density? - Chemistry Stack Exchange
2013年1月6日 · "The ratio of the charge of an ion to its volume." The factors playing into the strength of an ion's charge density are therefore the charge of the ion (e.g. 2+ for Mg, 1+ for Na) and the effective volume which that charge acts over - which is where the ionic radius comes in. (Note this is different to atomic radius.) Charge density = charge/volume
Obtaining Surface Charge Density from the Potential
2018年3月13日 · Therefore $$\frac{\partial V_{below}}{\partial n}=0$$ The image charge is only a virtual charge to obtain the potential zero condition on the metal surface. The superposition of the field/potential of this virtual charge with the field/potential of the real charge can only be used to find the field in the space of the real charge down to the ...
What exactly does charge density mean in Gauss's law?
2024年3月24日 · The charge density in Gauss' law is simply a scalar function that specifies the distribution of charge in a region of space. The region may be 1, 2, or 3-dimensional as the case demands. Essentially, $\rho$ specifies the nature of the source of the electrostatic field, in terms both of its magnitude and geometry.
electromagnetism - Divergence of current density and charge …
2021年11月26日 · Each charge approximately produces a coulomb potential and because they are moving you would see the electric field (and magnetic field) change rapidly near the wire. The continuum approximation is then to not consider the individual charges but to consider a charge density $\rho(x)$ along the wire. See also the link from my last edit.
What's a charge density wave? - Physics Stack Exchange
2022年5月12日 · You call these excitations charge density waves (CDW). Now, the way some other references talk about charge density waves is quite different from this. Like in Condensed Matter Physics R. Shankar , here they considered the neighboring electron interaction and set a gap equation via the mean-field theory approach.
Question about the relationship between current density and …
2022年2月9日 · What you mean is the charge that is transported through the cross-section of the conductor, in which case your calculation is correct. The point is that the charge that is transported through the cross-sectional area is exactly the same as the charge in a volume with the same area and a length l= v*t. $\endgroup$ –
What is the difference between charge density wave (CDW) and …
2022年2月3日 · Wikipedia has rather clear articles about both the Charge density wave and the Charge ordering (although without really establishing link between the two). Clearly, the two phenomena may overlap, and some could even say that CDW is a particular case of CO or vice versa. There are however differences: Charge density wave (CDW)
electrostatics - Dirac delta function and volume charge density ...
2017年1月28日 · The charge density for a point charge is given by charge per unit volume. Since the there is no charge except at the position $\vec{r}$ , the charge density vanishes at all points except $\vec{r}$ .
electrostatics - Why is electric field strong at sharp edges?
2012年10月30日 · Then, the surface charge density, the quantity that describes how crowded the charges are, is higher at the smaller sphere. To see why, remember that, since this system is a conductor, its surface is an equipotential.
Charge density of an atomic orbital - Physics Stack Exchange
2015年4月1日 · Finally they point out that the probability density for the electron can be regarded as a charge density, a stationary cloud of negative charge. But, this is wrong, it only a "probability density" in the sense that this is the probability to find a particle at a given location for a given associated (hypothetical) large number of identical ...