A conductor of cross-sectional area $1 imes 10^{-6} m^2$ carries a current of 4A. If the number density of free electrons is $10^{28} m^{-3}$, and the charge on an electron is $1.6 imes 10^{-19} C$, what is the magnitude of the drift velocity of the electrons, assuming they all contribute to the current?

A charged particle having drift velocity of $7.5\,\,{\rm{ imes }}\,\,{\rm{1}}{{\rm{0}}^{ - 4}}\,{\rm{m}}\,{{\rm{s}}^{ - 1}}$ in an electric field of $3\,\,{\rm{ imes }}\,\,{\rm{1}}{{\rm{0}}^{ - 10}}\,\,{\rm{V}}{{\rm{m}}^{ - 1}}$, has a mobility in ${{\rm{m}}^2}\,{{\rm{V}}^{ - 1}}\,{{\rm{s}}^{ - 1}}$ of:

A potential difference is applied across the ends of a metallic wire. If the potential difference is doubled, the drift velocity will

The drift velocity of electrons in a copper wire is $10^{-4} \, m/s$ when an electric field of $10 \, V/m$ is applied. Determine the electron mobility.

The steady current flows in a metallic conductor of non-uniform cross-section. The ${\rm{quantity}}\,\,{\rm{/}}\,{\rm{quantities}}$ constant along the length of the conductor ${\rm{is}}\,\,{\rm{/}}\,\,{\rm{are}}$

A silver wire of length 10 m and radius $$\frac{2 imes 10^{-2}}{\sqrt{\pi}}$m has electrical resistance of$5 \Omega$. The current density in the wire for an electric field strength of 10 (V/m) is:

The drift velocity of the electrons in a copper wire of length ${\rm{2}}\,\,{\rm{m}}$ under the application of a potential difference of ${\rm{220}}\,\,{\rm{V}}$ is $0.5\,\,\,m{s^{( - 1)}}$. Their mobility (${\rm{in}}\,\,{{\rm{m}}^2}\,{{\rm{V}}^{ - 1}}\,{{\rm{s}}^{ - 1}}$)

Drift velocity ${v_d}$ varies with the intensity of electric field as per the relation

A potential difference $V$ is applied to a copper wire of length $l$ and thickness $d$. If $V$ is doubled, the drift velocity

A copper wire of cross-sectional area $2.0\,\,m{m^2}$, resistivity $= 1.7\,\, imes \,\,{10^{ - 8}}\,\,{\rm{\Omega }}\,{\rm{m}}$, carries a current of $1\,A$. The electric field in the copper wire is

Two identical conductors maintained at same temperatures are given potential differences in the ratio ${\rm{1 : 2}}$. Then the ratio of their drift velocities is