항목 |
기호표시 |
산출공식 |
SI 위 |
SI기호 |
CGS단위 |
배수(CGS/SI) |
전류 |
I, i |
I=E/R, I=E/Z, I=Q/t |
Ampere |
A |
Abampere |
10-1 |
style="font-family:굴림;">전하량 |
Q, q |
Q=I×t, Q=C×E |
Coulomb |
C |
Abcoulomb |
10-1 |
style="font-family:굴림;">전압 |
E, e |
E=I×R, E=W/Q |
Volt |
V |
Abvolt |
108 |
style="font-family:굴림;">저항 |
R, r |
R=E/I, R=(ρ×l)/A |
Ohm |
Ω |
Abohm |
109 |
style="font-family:굴림;">저항률 |
ρ |
p=(R×A)/l |
Ohm-meter |
Ω·m |
Abohm-cm |
1011 |
Conductance |
G, g |
G=(γ×A)/l, G=A/(ρ×l) |
Siemens |
S |
Abmho |
10-9 |
style="font-family:굴림;">도전율 |
G |
G=R/Z2 |
Siemens |
S |
Abmho |
10-9 |
Capacitance |
γ |
γ=l/ρ, γ=l/(R×A) |
Siemens-meter |
S/m |
Abmho/cm |
10-11 |
C |
C=Q/E |
Farad |
F |
Abrarad |
10-9 |
style="font-family:굴림;">유전율 |
ε |
|
Farad/meter |
F/m |
Stat farad/cm |
8.85×10-12 |
style="font-family:굴림;">상대유전율 |
εr |
εr=ε/εo |
Numerical |
|
Numerical |
1 |
style="font-family:굴림;">자기유도 |
L |
L=-N×(d쬳/dt) |
Henry |
H |
Abhenry |
109 |
style="font-family:굴림;">상호유도 |
M |
M=K×(L1×L2)1/2 |
Henry |
H |
Abhenry |
109 |
Energy |
J |
J=e×I×t |
Joule |
J |
Erg |
107 |
kWh |
kWh=kW/3600, 3.6M×J |
Kilowatthour |
kWh |
|
36×1012 |
style="font-family:굴림;">유효전력 |
W |
W=J/t, W=E×I×cosθ |
Watt |
W |
Abwatt |
107 |
style="font-family:굴림;">무효전력 |
jQ |
jQ=E×I×sinθ |
Var |
var |
Abvar |
107 |
style="font-family:굴림;">피상전력 |
VA |
VA=E×I |
Volt-ampere |
VA |
|
|
style="font-family:굴림;">역률 |
PF, pf |
PF=W/(V×A), PF=W/(W+jQ) |
Ohm |
|
|
1 |
유도 Reactance |
XL |
XL=2π×f×L |
Ohm |
Ω |
Abohm |
109 |
용량 Reactance |
XC |
XC=1/(2π×f×C) |
Ohm |
Ω |
Abohm |
109 |
Impedance |
Z |
Z=E/I, Z=R+j×(XL-XC) |
Siemens |
Ω |
Abohm |
109 |
Susceptance |
B |
B=X/Z2 |
Siemens |
S |
Abohm |
10-9 |
Adimittance |
Y |
Y=I/E, Y=G+jB |
Hertz |
S |
Abohm |
10-9 |
주파수 |
f |
f=1/T |
Second |
Hz |
Cps, Hz |
1 |
주기 |
T |
T=1/f |
Second |
s |
Second |
1 |
시간상수 |
T |
T=L/R, T=R×C |
Radians/second |
s |
Second |
1 |
각속도 |
ω |
ω=2π×f |
|
rad/s |
Radians/second |
1 |
|