A charge \( Q \) is uniformly distributed in a dielectric sphere of radius \( R \) (having diele...

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A charge \( Q \) is uniformly distributed in a dielectric sphere of radius \( R \) (having dielectric constant unity). This dielectric sphere is enclosed by a concentric spherical shell of radius \( 2 R \) and having uniformly distributed charge \( 2 Q \). Which of the following graph correctly represents variation of electric field with distance \( r \) from the common center?
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