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The region between two concentric sphere...

The region between two concentric spheres of radii a and b (gt a) contains volume charge The I where C is a constant and r is the radial distance as shown in figure. A point dens') barge q is placed at the origin, `r = 0`. c find the value of C for which the electric field in the region between the spheres is constant (i.e. r independent).

A

`Q/(2pi (b^(2)-a^(2)))`

B

`(2Q)/(pi (a^(2)-b^(2)))`

C

`(2Q)/(pi a^(2))`

D

`Q/(2pi a^(2))`

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The correct Answer is:
D
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