CHAPTER 9 UNITS CONVERSION
9-1
9. UNITS CONVERSION
9.1 CGS - SI Conversion
SI Units multiplied by Conversion equals CGS Units.
Quantity
SI Units
Conversion
SI/CGS
CGS Units
Electric Current [I]
Ampere [A]
10
-1
abampere
Flux Density [B]
1
Tesla [T]
10
4
Gauss [G]
Force
Newton [N]
10
5
dyne [dyn]
Intensity of Magnetization
[J]
3
Tesla [T]
10
4
/
4
π
2
e.m.u.
Length [l]
meter [m]
10
2
centimeter [cm]
4
Magnetic constant [u
0
]
Henry/meter [H/m]
10
7
/4
π
[unity]
Magnetic dipole moment
[j]
6
Weber meter [Wb
m]
10
10
/4
π
5
e.m.u.
Magnetic field strength
[H]
Ampere/meter
[A/m]
79.6
Oersted [Oe]
Magnetic flux [Æ]
Weber [W]
10
8
Maxwell [Mx]
Magnetic pole strength [p] Weber [W]
10
8
/4
π
e.m.u.
Magnemotive force [F]
Ampere [A]
Gilbert [Gb]
Mass
kilogram [kg]
10
3
gram [g]
7
Permeability, absolute
[u]
Henry/meter [H/m]
10
7
/
4
π
Unitless
8
Permeability, relative [u]
-
1
-
9
Permeance
Henry [H]
4
π
/10
9
Maxwell/gilbert
Power [P]
watt [W]
10
7
erg/second
Reluctance [Rm]
1/Henry [H
-1
]
4
π
/10
9
Gilbert/Maxwell
10
Susceptibility
ratio
1/4
π
e.m.u
Temperature [T]
Kelvin [K]
K= °C + 273.16
degree Celsius [°C]
Time [t]
second [s]
1
second [s]
Work or energy
joule [J]
10
7
erg
Notes
1. Equal to Webers per square meter.
2. Equal to G/4
π
or dyn/cm
2
Oe.
3. Equal to N/Am.
4. Equal to permeability of space.
5. Equal to dyn cm/Oe.
6. Equal to Nm
2
/A.
7. Equal to B/H.
8. Equal to B/u
0
H.
9. Inverse of reluctance.
10.
Relative volume expressed as a percentage, equal to J/u
0
H.
Table 9.1.1 CGS-SI Units Conversion
Summary of Contents for 2130
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