Reference Terms and Units: Difference between revisions

Latest revision as of 22:33, 18 January 2010

This article is for the conference on Monday January 11

Variable	Description	Unit variables	Units
${\vec {E}}$	Electric Field Intensity	$V/m\,\!{\text{ or }}N/C\,\!$	Volts per Meter or Newtons per Coulomb
${\vec {D}}$	Electric Flux Density	$C/m^{2}\,\!$	Coulombs per Meter squared
${\vec {H}}$	Magnetic Flux Intensity	$A/m\,\!$	Amps per Meter
${\vec {B}}$	Magnetic Flux Density or Magnetic Induction	$T\,\!{\text{ or }}Wb/m^{2}\,\!{\text{ or }}G\,\!$	Tesla or Webers per Meter squared or Gauss

Relationships

${\vec {D}}=\epsilon {\vec {E}}$

${\vec {B}}=\mu {\vec {H}}$

John Hawkins

@@ Line 18: / Line 18: @@
 |Electric Field Intensity
-|<math> V/m\,\!</math> or <math> N/C\,\!</math>
+|<math> V/m\,\!\text{ or } N/C\,\!</math>
 |Volts per Meter or Newtons per Coulomb
 |-
@@ Line 42: / Line 42: @@
 |Magnetic Flux Density or Magnetic Induction
-|<math> T \,\!</math> or <math>W/m^2\,\!</math> or <math> G \,\!</math>
+|<math> T \,\!\text{ or }Wb/m^2\,\!\text{ or } G \,\!</math>
-|Tessla or Watts per Meter squared or Gauss'
+|Tesla or Webers per Meter squared or Gauss
 |}
 Relationships
-<math>\vec D=\in \vec E</math>
+<math>\vec D=\epsilon \vec E</math>
 *In free space:
-*<math>\in_0=1/(36*\pi)*10^{-9} \,\!</math> F/m
+*<math>\epsilon_0=\frac{1}{36\pi}\times10^{-9} \ \ F/m</math>
@@ Line 60: / Line 60: @@
 *In free space:
-*<math>\mu_0=4*\pi*10^{-7} \,\!</math> H/m
+*<math>\mu_0=4\pi\times10^{-7} \ \ H/m</math>
 ==Reviewed By==
@@ Line 67: / Line 67: @@
 ==Read By==
 John Hawkins
-Comments and questions:
-*I love the article on units.  I hate these units where I don't know what applies to what or what comes from what.  Good idea.  I'm also interested in the derivation of them.  Would you be interested for me to contribute with the derivation of some of these?
-*I think Tesla are equivalent to <math>Wb/m^2\ </math>, Webers per meter squared.
-*(It doesn't really matter, but the character you're using for epsilon is actually the set inclusion operator.  \epsilon or \varepsilon is technically correct.)