EMEC - Greg: Difference between revisions

Revision as of 13:53, 7 January 2010

Symbol	Units	Name	Definition
		Flux	The rate of transfer of energy (or another physical quantity) per unit area <ref> Wiktionary - Flux </ref>
$\vec{E}$	$\frac{V}{M}$	Electric field (intensity/strength)	The space surrounding an electric charge. It will exert a force on other electrically charged objects.
$\vec{D}$	$\frac{C}{M^{2}}$	Electric (flux density/displacement field)
$\vec{H}$	$\frac{A}{M}$	Magnetic field (intensity/strength)
$\vec{B}$	$T = \frac{W}{M^{2}}$	Magnetic (flux density/induction)

Electric field lines <ref> Electric field lines</ref>

Electric flux density <ref> [http://www.bun.kyoto-u.ac.jp/~suchii/maxwell.eq.html Electric flux density</ref>

Electric	Magnetic	Notes
$V = \int \vec{E} \vec{d l}$	$\vec{F} = \int \vec{H} \vec{d l}$
$\sum_{n} V_{n} = 0 = \oint \vec{E} \vec{d l}$	$\oint \vec{H} \vec{d l} = N i = \sum_{n} H l + N i = 0$	Kirchoff's voltage law, Ampere's law
$\sum_{n} I_{n} = 0 = \oint_{S} \vec{J} \vec{d S}$	$\oint \vec{B} \vec{d S} = 0$	Kirchoff's current law, The B-field has to go around in a loop
$\oint \vec{J} \vec{d S} = I$	$\int \vec{B} \vec{d S} = Φ$	Magnetic flux, Phi
$R = \frac{V}{I}$	$ℜ = \frac{F}{Φ} = \frac{N i}{Φ}$	Reluctance
$I = \frac{V}{R} = G V$ or $\vec{J} = σ \vec{E}$	$\vec{B} = μ H$	Assumes linearity - exceptions: Hysterisis loop, etc

@@ Line 27: / Line 27: @@
 |}
-[[Image:fieldlines.jpg|thumb|Electric field lines <ref> [http://www.molcad.de/competence/fieldlines.html.en Electric Field lines]</ref> ]]
+[[Image:fieldlines.jpg|thumb|300px|Electric field lines <ref> [http://www.molcad.de/competence/fieldlines.html.en Electric field lines]</ref> ]]
+[[Image:Electflux.jpg|thumb|300px|Electric flux density <ref> [http://www.bun.kyoto-u.ac.jp/~suchii/maxwell.eq.html Electric flux density</ref> ]]
 ===Analogies between Electric & Magnetic Circuits===