Question

what is the total current density in a conductor

Answer 1

Current density is donated by 'J' its a vector quantity.
Amount of current in a conductor is given by the expression
J=I/A
Where,
I is current per unit area (A)

Answer 2

10^4 to 10^7 because of thin case if conductirs vacancy part and the other one id overkapping on each othevdue to which the current densuty is this