SI Units of Important Physical Quantities
The Seven base units In Physics:
length | metre (m) |
---|---|
mass
|
kilogram (kg)
|
time
|
second (s)
|
electric current
|
ampere (A)
|
Thermodynamic temperature
|
kelvin (K)
|
luminous intensity
|
candela (cd)
|
amount of substance
|
mole (mol)
|
The DERIVED Units:
Current | ampere (A) |
---|---|
Potential
difference(U)
|
volt
(V = W/A)
|
Quantity
of electricity(Q)
|
coulomb
(C = A.s)
|
Power(P)
|
watt
(W = J/s)
|
Energy(W)
|
joule
(J = N.m)
|
Magnetic
induction(B)
|
tesla
(T = Wb/m²)
|
Electric
field(E)
|
volt
per metre (V/m)
|
Magnetic
field strength(H)
|
ampère
per metre (A/m)
|
Electric
conductance(G)
|
siemens
(S = A/V)
|
Attenuation
|
decibel
(dB)
|
mass
|
kilogram (kg)
|
Volume(V)
|
m³
|
Force(F)
|
newton
(N)
|
Torque(M)
|
N.m
|
Pressure(p)
|
pascal
(Pa)
|
Dynamic
viscosity
|
Pa.s
|
Kinematic
viscosity
|
m².s-1
|
Acoustic
pressure(p)
|
pascal
(Pa)
|
Dynamic
volume(v)
|
m³
|
Length
|
metre
(m)
|
wavelength
|
metre
(m)
|
Area
(A)
|
square
metre m²
|
Volume(V)
|
cubic
metre m³
|
Speed/Velocity(v)
|
metre
per second m/s
|
acceleration(a)
|
metre
per second squared m/s²
|
wavenumber(s)
|
reciprocal
metre
|
density,
mass density
|
kilogram
per cubic metre kg/m³
|
surface
density(A)
|
kilogram
per square metre kg/m²
|
specific
volume(v)
|
cubic
metre per kilogram m³/kg
|
current
density(j)
|
ampere
per square metre A/m²
|
magnetic
field strength(H)
|
ampere
per metre A/m
|
concentration(c)
|
mole
per cubic metre mol/m³
|
mass
concentration
|
kilogram
per cubic metre kg/m³
|
luminance(Lv)
|
candela
per square metre cd/m²
|
refractive
index(n)
|
One
(1)
|
relative
permeability(µr)
|
One
(1)
|
frequency
|
hertz(Hz)
|
force
|
newton(N)
|
pressure/stress
|
pascal(Pa)
|
energy/work/amount
of heat
|
joule(J)
|
power/radiant
flux
|
watt(W)
|
electric
charge/amount of electricity
|
coulomb(C)
|
electric
potential difference/electromotive force
|
volt(V)
|
capacitance
|
farad(F)
|
electric
resistance
|
ohm(O)
|
electric
conductance
|
Siemens
(S)
|
magnetic
flux
|
weber(Wb)
|
magnetic
flux density
|
tesla(T)
|
inductance
|
henry(H
= Wb/A)
|
luminous
flux
|
lumen(lm)
|
illuminance
|
lux(lx)
|
dynamic
viscosity
|
pascal
second(Pa s)
|
moment
of force
|
newton
metre(N m)
|
surface
tension
|
newton
per metre(N/m)
|
angular
velocity
|
radian
per second(rad/s)
|
specific
energy
|
joule
per kilogram(J/kg)
|
thermal
conductivity
|
watt
per metre kelvin(W/(m K))
|
energy
density
|
joule
per cubic metre(J/m3)
|
electric
field strength
|
volt
per metre(V/m)
|
permittivity
|
farad
per metre(F/m)
|
permeability
|
henry
per metre(H/m)
|
radiance
|
watt
per square metre steradian W/(m² Sr)
|
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