Charges Q, 2Q and 4Q are uniformly distributed in three dielectric sol

1.	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 magnitudes of the electric fields at point P at a distance R from the center of spheres 1, 2 and 3 are E1, E2 and E3 respectively, then(A) E1 > E2 > E3 (B) E3 > E1 > E2 (C) E2 > E1 > E3 (D) E3 > E2 > E1
Answer» (A) E₁ > E₂ > E₃ For point outside dielectric sphere E = Q/4π∈₀r² For point inside dielectric sphere E = E_s r/R Exact Ratio E₁ : E₂ : E₃ = 2 : 4 : 1

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 magnitudes of the electric fields at point P at a distance R from the center of spheres 1, 2 and 3 are E1, E2 and E3 respectively, then(A) E1 > E2 > E3 (B) E3 > E1 > E2 (C) E2 > E1 > E3 (D) E3 > E2 > E1

Answer»

(A) E₁ > E₂ > E₃

For point outside dielectric sphere E = Q/4π∈₀r²

For point inside dielectric sphere E = E_s r/R

Exact Ratio E₁ : E₂ : E₃ = 2 : 4 : 1

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