Drift Speed

Two conducting wires X and Y of same diameter but different materials are joined in series across a battery. If the number density of electrons in X is twice that in Y, find the ratio of drift velocity of electrons in the two wires would be:

Derive an expression for the resistivity of a good conductor, in terms of the relaxation time of electrons.

Two metallic wires of the same material have the same length but cross-sectional area is in the ratio $1:2$. They are connected (i) in series and (ii) in parallel. Compare the drift velocities of electrons in the two wires in both the cases (i) and (ii).

The relation between current and drift velocity is

Drift velocity of electrons is due to _____.

When potential difference across a given copper wire is increase, drift velocity of charge carriers

The resultant flow of current in a conductor in the absence of electric field is

A steady current $I$ is set up in a wire whose cross-sectional area decreases in the direction of the flow of the current. Then, as we examine the narrowing region

The resultant flow of current in a conductor in the absence of electric field is

A current $i$ is flowing through the wire of diameter $\left(d\right)$ having drift velocity of electrons $v_d$ in it. What will be new drift velocity when diameter of wire is made $\frac{d}{4}?$

A metal wire carries a charge of $1200 \mathrm{C}$ in $20$ minutes. If the area of the cross-section of the wire is $25 {\mathrm{mm}}^2$ and the material of the metal contains $6.0\times {10}^{22}$ free electrons ${\mathrm{cm}}^{-3}$, the drift velocity of the electrons in the wire is

Although free electrons are continuously in motion inside a conductor.Their average velocity is zero when no electric field is applied. Give reason.

Which of the following statement is not true for the motion of free electrons in the absence of electric field?

At normal room temperature, in a solid piece of metal, free electrons: 

If current in a current carrying wire is $1.5 \mathrm{A}$, number of free electrons per unit volume is $8\times {10}^{28} {\mathrm{m}}^{-3}$ and area of cross section is $5 {\mathrm{mm}}^2$ . Drift velocity of electrons will be

The drift velocity of the electrons in a copper wire of length 2 m under the application of a potential difference of 200 V is 0.5 $\mathrm{m} {\mathrm{s}}^{-1}$. If their mobility is $n\times {10}^{-3}$$\mathrm{ }{\mathrm{m}}^2{\mathrm{V}}^{-1}{\mathrm{s}}^{-1}$, find the value of $n$.

A copper wire of cross-section area $1.0 {\mathrm{mm}}^2$ is carrying a current of $0.5 \mathrm{A}$. If the density of free electrons is $8.5\times {10}^{22} {\mathrm{cm}}^{-3}$. Calculate the drift velocity of free electrons.

Derive the relation between the drift velocity and electric field. What is mobility? Explain dependence of drift velocity and mobility.