Symbol[1] | Name of quantity | Unit name | Symbol | Base units |
---|---|---|---|---|
E | energy | joule | J = C⋅V = W⋅s | kg⋅m2⋅s−2 |
Q | electric charge | coulomb | C | A⋅s |
I | electric current | ampere | A = C/s = W/V | A |
J | electric current density | ampere per square metre | A/m2 | A⋅m−2 |
U, ΔV; Δϕ; E, ξ | potential difference; voltage; 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 |
p | electric dipole moment | coulomb metre | C⋅m | A⋅s⋅m |
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 = N⋅A−1⋅m−1 | kg⋅s−2⋅A−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 |
F | magnetomotive force | ampere | A = Wb/H | A |
R | magnetic reluctance | inverse henry | H−1 = A/Wb | kg−1⋅m−2⋅s2⋅A2 |
P | magnetic permeance | henry | H = Wb/A | kg⋅m2⋅s-2⋅A-2 |
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 |
m | magnetic dipole moment | ampere square meter | A⋅m2 = J⋅T−1 | A⋅m2 |
σ | mass magnetization | ampere square meter per kilogram | A⋅m2/kg | A⋅m2⋅kg−1 |