Current Density In Conductors

The current density in a conductor is 5 A //m^2 when an electric field of 50 V/m is applied across it. Calculate the conductivity of the material.

Define the term current density of a metallic conductor. Deduce the relation connecting current density and conductivity of the conductor when electric field E, is applied to it.

Derive the expression for the current density of a conductor in terms of the conductivity and applied electic field. Explain with reason how the mobility of electrons in a conductor changes when the potential difference applied is doubled, keeping the temperature of the conductor constant.

Derive the expression for the current density of a conductor in terms of the conductivity and applied electic field. Explain with reason how the mobility of electrons in a conductor changes when the potential difference applied is doubled, keeping the temperature of the conductor constant.

The electric field E, current density j and conductivity sigma of a conductor are related as