A conductor-carries a current of `50 muA` If the area of cross-section of the conductor is `50 mm^(2)`, then value of the current density in Amis

A conductor wire having 10^29 free electrons / m^3 carries a current of 20A. If the cross-section of the wire is 1mm^2 , then the drift velocity of electrons will be :

How does the resistance of a conductor depend on: (a) length of the conductor? (b) area of cross-section of the conductor? (c) temperature of the conductor?

Current Density In Conductors

Net charge in a current-carrying conductor is

A cylinder conductor AB of non uniform area of cross-section carries a current of 5A. The radius of the conductor at one end A is 0.5 cm.The current density at the other end of the conductor is half of the value at A. The radius of the conductor at the end B is nearly

How is electrical conductance of a conductor related with length and area of cross section of the conductor ?

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).