Current density via number density and drift velocity¶
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 positive charges at this point.
Conditions:
Charge carriers carry the the same amount of charge.
Links:
- current_density¶
current_densityof charge carriers.
- Symbol:
j- Latex:
\(j\)
- Dimension:
current/area
- number_density¶
number_density, or number of charge carriers per unit volume.
- Symbol:
n- Latex:
\(n\)
- Dimension:
1/volume
- drift_velocity¶
drift_velocityof charge carriers.
- Symbol:
u- Latex:
\(u\)
- Dimension:
velocity
- Symbol:
q- Latex:
\(q\)
- Dimension:
charge
- law¶
j = q * n * u- Latex:
- \[j = q n u\]