Physics:SI electromagnetism units

SI electromagnetism units
Symbol	Name of quantity	Unit name	Symbol	Base units
Q	electric charge	coulomb	C	A⋅s
I	electric current	ampere	A	A (= W/V = C/s)
J	electric current density	ampere per square metre	A/m2	A⋅m−2
U, ΔV, Δφ; E	potential difference; electromotive force	volt	V	J/C = kg⋅m2⋅s−3⋅A−1
R; Z; X	electric resistance; impedance; reactance	ohm	Ω	V/A = kg⋅m2⋅s−3⋅A−2
ρ	resistivity	ohm metre	Ω⋅m	kg⋅m3⋅s−3⋅A−2
P	electric power	watt	W	V⋅A = kg⋅m2⋅s−3
C	capacitance	farad	F	C/V = kg−1⋅m−2⋅A2⋅s4
ΦE	electric flux	volt metre	V⋅m	kg⋅m3⋅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/m2	A⋅s⋅m−2
ε	permittivity	farad per metre	F/m	kg−1⋅m−3⋅A2⋅s4
χe	electric susceptibility	(dimensionless)	1	1
G; Y; B	conductance; admittance; susceptance	siemens	S	Ω−1 = kg−1⋅m−2⋅s3⋅A2
κ, γ, σ	conductivity	siemens per metre	S/m	kg−1⋅m−3⋅s3⋅A2
B	magnetic flux density, magnetic induction	tesla	T	Wb/m2 = kg⋅s−2⋅A−1 = N⋅A−1⋅m−1
Φ, ΦM, ΦB	magnetic flux	weber	Wb	V⋅s = kg⋅m2⋅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⋅m2⋅s−2⋅A−2
μ	permeability	henry per metre	H/m	kg⋅m⋅s−2⋅A−2
χ	magnetic susceptibility	(dimensionless)	1	1

See also

• SI
• Speed of light
• List of electromagnetism equations

External links

• History of the electrical units.