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Refer to the arrangement of charges in F...

Refer to the arrangement of charges in Fig. and a gaussian surface of radius R with Q at the centre.Then,

A

total flux through the surface of the sphere is `-Q/ε_0`.

B

field on the surface of the sphere is `-Q/(4 pi ε_0 R^2)`.

C

flux through the surface of sphere due to 5Q is zero.

D

field on the surface of sphere due to -2Q is same everywhere.

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