Physics Assignment Help With Current Density

12.2 Current Density motion of charge

(1) The magnitude of motion of charge is equal to the current per unit area surrounding that point and normal to the direction of charge flow. Thus,

J = electric current physics

(2) The direction of motion of charge is the same as the direction of velocity vector physics homework help of the ordered motion of positive charge-carriers.

If the current is due to the motion of both positive and negative charges, the current density is given by

motion of charge= drift velocity

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