SI electromagnetism units

SI electromagnetism units
Symbol[1]	Name of Quantity	Derived Units	Unit	Base Units
I	Electric current	ampere (SI base unit)	A	A (= W/V = C/s)
Q	Electric charge	coulomb	C	A·s
U, ΔV, Δφ; E	Potential difference; Electromotive force	volt	V	J/C = kg·m^2·s^−3·A^−1
R; Z; X	Electric resistance; Impedance; Reactance	ohm	Ω	V/A = kg·m^2·s^−3·A^−2
ρ	Resistivity	ohm metre	Ω·m	kg·m^3·s^−3·A^−2
P	Electric power	watt	W	V·A = kg·m^2·s^−3
C	Capacitance	farad	F	C/V = kg^−1·m^−2·A^2·s^4
ΦE	Electric flux	volt metre	V·m	kg·m^3·s^−3·A^−1
E	Electric field strength	volt per metre	V/m	N/C = kg·m·A^−1·s^−3
D	Electric displacement field	coulomb per square metre	C/m^2	A·s·m^−2
ε	Permittivity	farad per metre	F/m	kg^−1·m^−3·A^2·s^4
χe	Electric susceptibility	(dimensionless)	-	-
G; Y; B	Conductance; Admittance; Susceptance	siemens	S	Ω^−1 = kg^−1·m^−2·s^3·A^2
κ, γ, σ	Conductivity	siemens per metre	S/m	kg^−1·m^−3·s^3·A^2
B	Magnetic flux density, Magnetic induction	tesla	T	Wb/m^2 = kg·s^−2·A^−1 = N·A^−1·m^−1
Φ, ΦM, ΦB	Magnetic flux	weber	Wb	V·s = kg·m^2·s^−2·A^−1
H	Magnetic field strength	ampere per metre	A/m	A·m^−1
L, M	Inductance	henry	H	Wb/A = V·s/A = kg·m^2·s^−2·A^−2
μ	Permeability	henry per metre	H/m	kg·m·s^−2·A^−2
χ	Magnetic susceptibility	(dimensionless)	-	-

See also

• SI units
• Second
• Speed of light

References

1. International Union of Pure and Applied Chemistry (1993). Quantities, Units and Symbols in Physical Chemistry, 2nd edition, Oxford: Blackwell Science. ISBN 0-632-03583-8. pp. 14–15. Electronic version.

External links

• History of the electrical units.