Page 579 - Engineering Electromagnetics, 8th Edition

APPENDIX B Units 561

Table B.2 Conversion of International to Gaussian and other units
8
(use c = 2.997 924 58 × 10 )
Quantity 1 mks unit = Gaussian units = Other units
2
d 1m 10 cm 39.37 in.
5
F 1N 10 dyne 0.2248 lb f
7
W 1J 10 erg 0.7376 ft-lb f
Q 1C 10c statC 0.1 abC
1 C/m 3 10 −5 c statC/cm 3 10 −7 abC/cm 3
ρ ν
D 1 C/m 2 4π10 −3 c (esu) 4π10 −5 (emu)
4
6
E 1 V/m 10 /c statV/cm 10 abV/cm
8
6
V 1V 10 /c statV 10 abV
I 1A 0.1 abA 10c statA
H 1 A/m 4π10 −3 oersted 0.4πc (esu)
V m 1A·t 0.4π gilbert 40πc (esu)
4
B 1T 10 gauss 100/c (esu)
6
8
1Wb 10 maxwell 10 /c (esu)
6
A 1 Wb/m 10 maxwell/cm
9
2
5
R 1 10 ab 10 /c stat
9
2
5
L 1H 10 abH 10 /c statH
C 1F 10 −5 2 10 −9 abF
c statF
c statS/cm
σ 1 S/m 10 −11 abS/cm 10 −7 2
2
7
3
µ 1 H/m 10 /4π (emu) 10 /4πc (esu)
c (esu)
1 F/m 4π10 −7 2 4π10 −11 (emu)
Table B.2 gives the conversion factors between the more important units of the
International System (or rationalized mks system) and the Gaussian system, and
several other assorted units.
Table B.3 lists the prefixes used with any of the SI units, their abbreviations,
and the power of ten each represents. Those checked are widely used. Both the
prefixes and their abbreviations are written without hyphens, and therefore 10 −6 F =
1 microfarad = 1µF = 1000 nanofarads = 1000 nF, and so forth.
Table B.3 Standard prefixes used with SI units
Prefix Abbrev. Meaning Prefix Abbrev. Meaning
atto- a- 10 −18 deka- da- 10 1
femto- f- 10 −15 hecto- h- 10 2
pico- p- 10 −12 kilo- k- 10 3
nano- n- 10 −9 mega- M- 10 6
micro- µ- 10 −6 giga- G- 10 9
milli- m- 10 −3 tera- T- 10 12
centi- c- 10 −2 peta- P- 10 15
deci- d- 10 −1 exa- E- 10 18