Establish Ohm's law from the concept of drift velocity of free elctrons.

Statement I: The drift velocity of free electrons is v_d when a current l passes through a copper wire. The drift velocity is halved when the same current passes through another copper wire of double the diameter. Statement II: For the same current, the drift velocity of free electrons in a metal wire is inversely proportional to the area of cross section of the wire.

Establish Avogadro's law.

A copper wire of cross-sectional area 1 mm^2 carries a current of 0.21A Find the drift velocity of free electrons. Given density of free electrons in copper =8.84 times 10^(24)m^-3 and electronic charge e=1.6 times 10^-19 C .

Establish the relation between drift velocity of electron and current density in metallic conductor.

Establish the relation between drift velocity of electron and current density in metallic conductor.

Define relaxation time of the free electrons drifting in a conductor.How is it related to the drift velocity of free electrons? Use this relation to deduce the expression for the electrical resistivity of the material.

When a current of 1 A flows through a copper wire of cross sectional area 1mm^2 the drift velocity of free electrons becomes v, What will be the drift velocity of free electrons when the same current flows through a copper wire of cross sectional area 2mm^2 ?

Establish Boyle's law with the help of kinetic theory of gases.

If a current passes through a metal conducting wire of area of cross section A, the drift velocity of free electrons inside the metal is v_d=1/( n e A) , where the amount of electric charge of an electron =e and the number of free electrons per unit volume of the metal=n. The applied electric field on the wire is E=V/l , where a potential difference V exists between two points, l apart, along the length of the wire. IF R is the resistance of the wire between those two points, then the resistivity of its material is rho=(RA)/l .Besides the mobility (mu) of the free electrons inside a wire is defined as their drift velocity for a unit applied electric field. Two copper wires have both lengths and radii in the ratio 1:2 if the ratio between the electric currents flowing through them is also 1:2 , what would be the ratio between the drift velocities of free electrons?

Velocity of electric current is much more___ than the drift velocity of free electrons in a metallic conductor [Fill in the blanks].