Prove that electric current density of a metallic conductor is directly proportional to the drift speed of electrons?

Prove that the current density of a metallic conductor is directly proportional to the drift velocity of electrons.

The magnetic field at a point due to a current carrying conductor is directly proportional to

Show that the capacitance of an insulated spherical conductor is directly proportional to the radius of the spherical conductor.

Fill ups The current flowing through a conductor is directly proportional to the applied…………across the ends of the conductor. Provided the physical conditions remains the same.

When an electric current is passed through a metallic conductor, heat is produced. Why?

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.

The speed at which current travels in conductor is nearly: