- #1
Naomi13
- 3
- 0
[ Moderator note- Edited to re-insert formatting template headers]
Hi guys,
I am stuck at this problem,
Here it is given that an insulating sphere of radius a, carries a charge density ρ=ρ'( a^2-r^2)cosθ, when r <a. How will the leading order term for the electric field at a distance d, far away from this charge distribution vary?
ρ' is a constant term.
I was thinking of calculating the total charge first. But here on integrating the given charge density I'm ending up getting zero.
∫ρ dτ= 0. Because dτ=r^2 sinθ dθ dφ dr
I'm unable to understand how to approach the sum, if I'm getting the total charge 0 in the first place?
The answer is that the field must vary by d^-1
Hi guys,
I am stuck at this problem,
Homework Statement
Here it is given that an insulating sphere of radius a, carries a charge density ρ=ρ'( a^2-r^2)cosθ, when r <a. How will the leading order term for the electric field at a distance d, far away from this charge distribution vary?
ρ' is a constant term.
Homework Equations
The Attempt at a Solution
[/B]I was thinking of calculating the total charge first. But here on integrating the given charge density I'm ending up getting zero.
∫ρ dτ= 0. Because dτ=r^2 sinθ dθ dφ dr
I'm unable to understand how to approach the sum, if I'm getting the total charge 0 in the first place?
The answer is that the field must vary by d^-1
Last edited: