Physics · Electrostatics

The electric field E is measured at point P(0, 0, d) for different charge configurations. Match the relations given in Column I with the corresponding charge distributions in Column II. Column I (Dependence of E on d) (P) E is independent of d (Q) E ∝ 1/d (R) E ∝ 1/d2 (S) E ∝ 1/d3 Column II (Charge Distribution) (1) Point charge q placed at the origin (2) Electric dipole with charges +q at (0,0,l) and −q at (0,0,−l), where 2l ≤≤ d (3) Infinite straight line charge along the x-axis with linear charge density λ (4) Two infinite parallel line charges along the x-axis at z = ±l carrying +λ and −λ respectively, with 2l ≤≤ d (5) Infinite plane sheet of charge lying in the x−y plane with uniform surface charge density σ