Surface & Volume Current Density |Magnetostatics|

Surface & Volume Current Density |Magnetostatics|

Surface Current Density
When Charge flows over a surface, we describe it by the Surface Current Density, K.
Definition: K is the current per unit width-perpendicular-to-flow.

of Volume Current Density
When the flow of charge is distributed throughout a three-dimensional region, we describe it by the volume current density, J
Definition: J is the current per unit area-perpendicular-to-flow.

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by…
S.S. Yadav
B. Tech (IIT Mandi)

[GingoPeter]

nice explanation, can you please help in this quiz related to the concept you have just explained? "A current I is uniformly distributed over a wire of circular cross-section with radius a. find the volume current density in the wire.

[nirmalaraj]

Great explanation! Thanks a lot, sir!

[abhilashbiswas]

Why di =dq/dt? Shouldn't it be Total current I = dq/dt

[juksaykaisey]

Great Video. It is possible to obtain \vec{K} with \vec{J}? Like \vec{K} = \vec{J } x \hat{n} ?

[milanrai]

Surface current density and volume current densities are just misnomers