1 Answer
The drift current is the electric current that results from the movement of charge carriers (like electrons or holes) due to an applied electric field. The formula for drift current is derived from Ohm's law and is given by:
\[
I_{\text{drift}} = q \cdot n \cdot A \cdot v_d
\]
Where:
Drift current is essentially the current resulting from charge carriers moving in response to an electric field applied across a conductor. The drift velocity \(v_d\) depends on the material properties and the strength of the electric field.
\[
I_{\text{drift}} = q \cdot n \cdot A \cdot v_d
\]
Where:
- \(I_{\text{drift}}\) is the drift current.
- \(q\) is the charge of the carrier (for an electron, it's \(1.6 \times 10^{-19} \, \text{C}\)).
- \(n\) is the number of charge carriers per unit volume (carrier concentration).
- \(A\) is the cross-sectional area of the material through which the current flows.
- \(v_d\) is the drift velocity, which is the average velocity of the charge carriers due to the electric field.
Drift current is essentially the current resulting from charge carriers moving in response to an electric field applied across a conductor. The drift velocity \(v_d\) depends on the material properties and the strength of the electric field.