The region between two concentric spheres of radii ' 
' and ' 
' respectively (see figure), has volume charge density 
, where 
is a constant and 
is the distance from the centre. At the centre of the spheres is a point charge 
. The value of 
such that the electric field in the region between the spheres will be constant, is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
As, Gaussian surface at distance r from centre,
At the centre of the spheres is a point charge 
. The value of 
such that the electric field in the region between the spheres will be constant is As,
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