- #1
humo90
- 13
- 0
Need a physical picture!
The electric potential of some charge configuration is given by V(r) = A*e^(-λr) / r
Its Electric field is E = A*[(λr+1)/(r^2)]*e^(-λr) [itex]\hat{r}[/itex]
And its charge density is ρ = 4*pi*A*ε0*δ(r) - [(ε0*(λ^2)*A*e^-λr) / r] , where δ(r) is delta function.
The thing that surprised me is the total charge is zero (Q = 0), how could this happened since I have a charge density? and can someone help me answering the following two questions.
1. What is the physical picture of the charge density (=how does the charge density look
like)?
2. Where could a charge density of this form appear in nature?
The electric potential of some charge configuration is given by V(r) = A*e^(-λr) / r
Its Electric field is E = A*[(λr+1)/(r^2)]*e^(-λr) [itex]\hat{r}[/itex]
And its charge density is ρ = 4*pi*A*ε0*δ(r) - [(ε0*(λ^2)*A*e^-λr) / r] , where δ(r) is delta function.
The thing that surprised me is the total charge is zero (Q = 0), how could this happened since I have a charge density? and can someone help me answering the following two questions.
1. What is the physical picture of the charge density (=how does the charge density look
like)?
2. Where could a charge density of this form appear in nature?