Current Density At A Point

Current Density In Conductors

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

Current Density|Combination Of Resistances|OMR

Introduction |Electric Current|Current Density|Questions

Current And Current Density|Drift Velocity

The electric intesity E, current density j and conductivity sigma are related as:

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

Is current density a vector or a scalar quantity ? Deduce the relation between current density and potential difference across a current carrying conductor of length l, area of cross-section A, and number density of free electrons n. How does the current density, in a conductor vary with (a) increases in potential gradient ? (b) increase in temperature? ( c) increase in length? (d) increase in area of cross-section? (Assume that the other factors remain constant in each case).

A point charge q moves with a non-relatives velocity v = const. Find the displacement current density dotd at a point location at a distance r from the charges on a straight line (a) coinciding with the charge path, (b) perpendicualr to the path and passing through the charge.