SI electromagnetism units

SI electromagnetism unitsv * d * e

Symbol[1] | 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

## 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.

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