PracticeMedium
Q.In the figure, the inner (shaded) region A represents a sphere of radius r_A=1, within which the electrostatic charge density varies with the radial distance r from the center as ρ_A = k r, where k is positive. In the spherical shell B of outer radius r_B, the electrostatic charge density varies as ρ_B = 2k / r. Assume dimensions are taken care of. The electric field at a point in region A is (JEE Advanced 2019)
a
k r / (3 ε₀)
b
k / ε₀
c
k r² / (3 ε₀)
d
k / (3 ε₀)
Correct Answer: Option A
The correct solution involves applying the fundamental concept to derive the final value step by step...