Elektrilaengu pindtihedus, tähis σ, on laeng pindalaühiku kohta (σ = Q/A); kahemõõtmeliste pindade, nt plaatide, puhul mõõdetakse seda kulonites ruutmeetri kohta (C/m²).
Surface electric charge density, symbol σ, is charge per unit area (σ = Q/A), measured in coulombs per square meter (C/m2) for 2D surfaces like plates.
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