Quantity
|
Symbol
|
Quantity
|
Symbol
|
Acceleration
|
α
|
Luminance
| L |
Acceleration, angular
|
α, ε
|
Luminous efficiency, relative
| V |
Action
| A, C, H |
Luminous emittance
| R |
Activity of radioactive source
| A |
Magnetic constant (permeability of vacuum)
| μo |
Amplitude
| A |
Magnetization
| J |
Angle
| α, φ, ψ, θ | Mass | m |
Area
| A, S |
Mass, electron
| me |
Avogadro’s number
| NA |
Mass, relative molecular (molecular weight)
| M |
Boltzman’s constant
| k |
Mass flow
| Qm |
Capacitance
| C |
Mobility
| b |
Charge, electric
| Q |
Modulus, elasticity (Young’s modulus)
| E |
Charge of electron
| e |
Modulus, shear
| G |
Coefficient, friction
| f, μ |
Moment, dipole
| p |
Coefficient, heat transfer
| α |
Moment of force
| M |
Coefficient, recombination
| A |
Moment of inertia (axial)
| J |
Concentration
| n, C |
Moment of inertia (dynamic)
| I |
Conductance
| G |
Moment of inertia
| Io |
Curvature
| ρ |
Moment, magnetic
| p m |
Density
| ρ |
Moment of momentum (angular momentum)
| L, L, l |
Density, charge, surface (linear)
| σ (τ) |
Momentum
| p |
Density, charge, volume
| ρ |
Musical interval
| lm |
Density, electric current
| J |
Number
| n, N |
Density, energy
| e, w, u |
Period
| Τ, τ |
Diameter
| D, d |
Permeability, relative
| μr |
Dielectric constant (relative permittivity)
| εr |
Permittivity, relative
| εr |
Difference of potentials
| U |
pH index
| pH |
Displacement
| D |
Planck constant
|
h
|
Efficiency
| η |
Planck-Dirac constant
|
ħ
|
Electric constant (permittivity of vacuum)
|
εo
|
Polarization, dielectric
|
p
|
Energy
| E, W |
Polarization, of molecule
|
α
|
Energy, free
| F |
Potential
|
V, φ
|
Energy, internal
| U |
Power
| P |
Energy, kinetic
| Ek |
Power, lens
| D |
Energy, potential
| Ep |
Pointing vector
| S |
Entropy
| S |
Pressure
|
p
|
Faraday’s constant
| F |
Quantity of heat
| Q |
Field intensity, electrical
| E |
Radius
|
r
|
Field intensity, magnetic
| H |
Reflection factor
|
ρ
|
Flux, electric
| N |
Refraction index
|
n
|
Flux, luminous
| Φ |
Reluctance
|
Rm
|
Flux, magnetic
| Φ |
Resistance, acoustic
|
Ra
|
Flux, radiant
| Φr |
Resistance, electrical
| R |
Flux linkage
| Ψ |
Resistance, mechanical, of acoustic system
|
Rm
|
Force
| F, P, O, R |
Resistivity
|
ρ
|
Force, electromotive
| ξ |
Solid angle
| Ω |
Force, magnetomotive
| F |
Specific heat
|
c
|
Frequency
| νf |
Spin number
|
s
|
Frequency, angular
| ω |
Surface tension
|
σ
|
Gas constant
| R |
Susceptibility, dielectric
|
χe
|
Gravitational constant
| G |
Susceptibility, magnetic
|
χm
|
Heat flow
| Φ |
Temperature
|
to, Λ
|
Heat of phase conversion (fusion, evaporation)
| H, r |
Temperature, absolute
| T |
Illumination
| E |
Thermal diffusitivity
|
a
|
Impedance
| Z |
Time
|
t
|
Impulse
| p |
Velocity (speed)
|
ν
|
Inductance
| L |
Velocity, angular
|
ω
|
Inductance, mutual
|
M
|
Velocity of light
|
c
|
Inductance, magnetic
| B |
Viscosity, dynamic
|
η
|
Intensity, current
| I |
Viscosity, kinematic
|
ν
|
Intensity, luminous
| I, J |
Volume
| V |
Intensity, sound
| I |
Volumetric flow rate
|
QV
|
Length
| l |
Wave number
|
ν, σ
|
Length of free path
| l |
Weight
| P,G |
Length of light wave
| λ |
Weight, specific
|
γ
|
Level, sound loudness
|
LN
|
Work
|
W
|
Level, sound pressure
| Lp |
|
|
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