Interpretation from Drift Velocity

If we think of motion of electrons in influence of the electric field.

Let us examine the motion of the electron.

Electrons must have some average velocity in influence of the electric field.

The average velocity of electrons in influence of electric field is called as drift velocity.

There is a relation between drift velocity (Vd) , current flowing (I) , a number of electrons (ne) and the cross sectional area of conductor(A).

The relation between drift velocity (Vd), current flowing (I) , number of electrons (ne) and cross-sectional area of conductor(A) is:- $v_{d} = \frac{I}{n e A}$

We can infer that the drift velocity (Vd) is dependent on current flowing (I) , a number of electrons (ne) and cross-sectional area of conductor(A).

It becomes easy to understand dependency of drift velocity (Vd) on (I ), (ne) and (A) when we examine their relation individually.

Let us understand the dependency of drift velocity (Vd) on current flow (I).

Current flow (I) is directly proportional to the drift velocity (Vd).

Means on increasing current flowing (I), drift velocity (Vd) increases.

Let us understand the dependency of drift velocity (Vd) on a number of electrons (ne).

Drift velocity (Vd) is inversely proportional to a number of electrons (ne).

Means on increasing number of an electron (ne) , drift velocity (Vd) decreases.

Finally, we move to the dependency of the cross-sectional area(A) to the drift velocity(Vd).

Let us examine the dependency of the cross sectional area(A) to the drift velocity(Vd).

Drift velocity (Vd) is inversely proportional to the cross-sectional area(A) of the conductor.

Means on increasing the cross-sectional area(A) of the conductor, drift velocity (Vd) decreases.

Revision

The average velocity of electrons in the influence of electric field is called as drift velocity.

The relation between drift velocity (Vd), current flowing (I) , number of electrons (ne) and cross-sectional area of conductor(A) is:- $v_{d} = \frac{I}{n e A}$

Current flow (I) is directly proportional to the drift velocity (Vd ).

Drift velocity (Vd) is inversely proportional to a number of electrons (ne).

Drift velocity (Vd) is inversely proportional to cross-sectional area(A) of the conductor.

The End