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·m^{2}/s^{2} or kg·m^{2}·s^{−2} 

 potential difference

V

V (volt)

kg·m^{2}/(A·s^{3}) or kg·m^{2}·A^{−1}·s^{−3} 

 