1
IAT (IISER) 2020
MCQ (Single Correct Answer)
+4
-1
The charge distribution inside a sphere of radius $R=2 a / b$ is given by the volume charge density $\rho=a r^2-b r^3$, where $a$ and $b$ are constants and $r$ is the radial distance from the center of the sphere. At what distance from the center of the sphere, will the electric field go to zero?
A
$4 a / 3 b$
B
$3 a / 2 b$
C
$a / b$
D
$6 a / 5 b$
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