Q.

 Charges Q, 2Q and 4Q are uniformly distributed in three dielectric solid spheres 1, 2 and 3 of radii R/2, R and 2R respectively, as shown in figure . If magnitude of the electric fields at point P at a distance R from the centre of sphere 1,2 and 3 are E1,E2 and E3   respectively, then 

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a

E3>E2>E1

b

E2>E1>E3

c

E1>E2>E3

d

E3>E1>E2

answer is C.

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Detailed Solution

E1=14π0.QR2; E2=14π0.2QR2;      E3=14π0.Q/2R2 Clearly  E2>E1>E3

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 Charges Q, 2Q and 4Q are uniformly distributed in three dielectric solid spheres 1, 2 and 3 of radii R/2, R and 2R respectively, as shown in figure . If magnitude of the electric fields at point P at a distance R from the centre of sphere 1,2 and 3 are E1, E2 and E3   respectively, then