well, current is not only the flow of electrons...in electrolytes positive ions also move. In general the current density is given by
\vec{j}=\rho_-\vec{v}_- +\rho_+\vec{v}_+
Here, \rho_-,\ \rho_+ are the charge density of negative and positive charges and v_-,\ v_+ are their drift velocities.
what is the direction of currentdensity ? direction of driftvelocity r current
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7 Answers
kaymant
·2009-06-18 04:17:09
The direction of the current density vector is same as the direction of electric field.
Dharun
·2009-06-18 04:26:40
sir ,direction of electricfield is from higher potential 2 lower potential but e-s move frm lower 2 higher with some driftvelocity by
→ →
J=n*lql*Vd
so direction is same as drift velocity It's correct?
kaymant
·2009-06-18 04:35:39
rajat sen
·2009-06-18 19:23:35
Dharun, what kaymant sir said is valid for conductors aswell it is the general expression of current density!!