FHSST Physics/Electrostatics/Summary

Important Equations and Quantities

Table 12.1: Units used in Electrostatics Units Quantity Symbol Unit S.I. base units Direction charge q or Q C (coulomb) A·s -- force ${\overrightarrow {F}}$ N (newton) kg·m/s² or kg·m·s² yes mass m kg (kilogram) kg -- acceleration ${\overrightarrow {a}}$ metre per second squared m/s² or m·s² yes radial distance r m (metre) m -- electric field ${\overrightarrow {E}}$ N/C or V/m kg·m/(A·s³) or kg·m·A−-1·s−3 yes work W J (joule) kg·m2/s2 or kg·m2·s−2 -- potential difference V V (volt) kg·m2/(A·s3) or kg·m2·A−1·s−3 --