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.

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

How Does Current Flow In Conductors|Drift Velocity And Current Electricity

Magnetic Force On A Current Carrying Conductor

There is a long solid conductor of resistivity rho=1times10^(-5)Omega -m,surrounded by air.There is a steady electric current along the length of the conductor.At point 'P' just outside the cylinder the electric field strength E=10^(-4)V/m is directed at an angle of alpha to the normal to the surface.Find the current density in the conductor in the vicinity of point 'P'

Introduction OF Electric Current || Current Density || Current in a Conductor