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Two non-conducting spheres of radii `R_1` and `R_2` and carrying uniform volume charge densities `+rho` and `-rho`, respectively, are placed such that they partially overlap, as shown in the figure. At all points in the overlapping region

A

the electrostatic field is zero

B

the electrostatic potential is constant

C

the electrostatic field is constant in magnitude

D

the electrostatic field has same direction

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The correct Answer is:
C, D
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