Electric current density | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-06-28

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Current_density


00:00:25 1 Definition
00:01:32 2 Importance
00:04:47 3 Calculation of current densities in matter
00:06:34 3.1 Free currents
00:06:44 3.2 Polarization and magnetization currents
00:11:08 3.3 Total current in materials
00:12:40 3.4 Displacement current
00:13:10 4 Continuity equation
00:13:51 5 In practice
00:16:34 6 See also
00:19:42 7 References



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SUMMARY
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In electromagnetism, current density is the amount of charge per unit time that flows through a unit area of a chosen cross section. The current density vector is defined as a vector whose magnitude is the electric current per cross-sectional area at a given point in space, its direction being that of the motion of the charges at this point. In SI base units, the electric current density is measured in amperes per square metre.