uniform charge density?
A solid insulating sphere of radius R has a uniform charge density of ρ. Which of the following correctly determines the E-field at r from the center if r <R?
- NCSLv 78 months ago
See citation for derivation of
field E = Q*r / (4πε₀R³)
Since Q = ρ*(4π/3)R³
E = ρ(4π/3)R³r / (4πε₀R³) = ρr / 3ε₀
your first choice
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