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A charge 'q' is placed at the centre of ...

A charge 'q' is placed at the centre of a conducting spherical shell of radius R, which is given a charge Q. An external charge Q' is also present at distance `R' (R' gt R)` from 'q'. Then the resultant field will be best represented for region `r lt R` by : [where r is the distance of the point from q]

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