|
Physical quantity equation
|
Symbol
|
Dimension
|
Measurement (in S.I.)
|
Unit
|
|
electric
current
|
I
|
Q/T
|
Ampere
|
C/sec
|
|
emf, voltage,
potential
|
E
|
ML2 /T2 Q
|
Volt
|
Kg m2/sec2C
|
|
resistance or
impedance
|
R
|
ML2 /TQ2
|
ohm
|
Kg m2 /secC2
|
|
electric
conductivity
|
σ
|
TQ2 /M2L2
|
mho per meter
|
sec C2/Kg m3
|
|
capacitance
|
C
|
T2 Q2 /ML2
|
Farad
|
sec2 C2/Kgm2
|
|
inductance
|
L
|
ML2 /Q2
|
Henry
|
Kg m2 /C2
|
|
current density
|
J
|
Q/TL2
|
ampere per
square meter
|
C/sec m2
|
|
charge density
|
ρ
|
Q/L3
|
coulomb per cubic meter
|
C/m3
|
|
magnetic flux,
Magnetic induction
|
B
|
M/TQ
|
weber per
square meter
|
Kg/sec C
|
|
magnetic
intensity
|
H
|
Q/LT
|
ampere per meter
|
C/m sec
|
|
magnetic vector
potential
|
A
|
ML/TQ
|
weber/meter
|
Kg m/sec C
|
|
electric
field intensity
|
E
|
ML/T2 Q
|
volt/meter or
newton/coulomb
|
Kg m/sec2 C
|
|
electric displacement
|
D
|
Q/L2
|
coulomb per square meter
|
C/m2
|
|
permeability
|
μ
|
ML/Q2
|
henry per meter
|
Kg m/C2
|
|
permittivity,
|
ε
|
T2Q2/ML3
|
farad per meter
|
sec2 C2/Kg m3
|
|
dielectric constant
|
K
|
M0L0T0
|
None
|
None
|
|
frequency
|
f or n
|
1/T
|
Hertz
|
sec-1
|
|
angular frequency
|
Ω
|
1/T
|
radians per second
|
sec-1
|
|
wave length
|
λ
|
L
|
Meters
|
M
|
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