
	Where results make sense

Topic: Current density

Related Topics

Siemens (unit)

Magnetic permeability

Electrical conductivity

Electromagnetism

Magnetism

Electromagnetic field

Magnetic field

Magnetic susceptibility

Magnetic helicity

Aluminium

1959 in South Africa

England national rugby union team

Ampere

New Caledonia

Arya Samaj

In the News (Fri 27 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Current Density
		The reason for this is simply that current is a flow of charge per unit time, and it has a direction (the direction the charge is moving in) and so if you consider a plane perpendicular to the direction of flow, the current is exactly the charge going through that plane per unit time.
		The most common symbol is simply a J. I guess to differentiate from total current usually denoted I. The "sub c" is probably to distinguish one kind of current from another.
		The flow of heat can also be measured by a heat current density, and usually has quite a different symbol (something involving Q, for example).
	www.newton.dep.anl.gov /newton/askasci/1993/physics/PHY109.HTM (185 words)

	Controlling current density - Patent 4587458
		Current density controlling apparatus, as in claim 1, in which the third electrode is dimensioned to be of comparable size to a typical workpiece.
		Current density controlling apparatus, as in claim 1, in which the third electrode is a disc of material which is thick relative to the diameter thereof.
		Current density controlling apparatus, as in claim 1, in which the third electrode is supported within the chamber by an electrical conductor which is electrically insulated.
	www.freepatentsonline.com /4587458.html (1400 words)

Try your search on: Qwika (all wikis)