State Ohm's law and derive it from the basic ideas of drift velocity of electrons.

State Ohm’s law and derive it from the basic idea of drift velocity of electrons.

How much is the drift velocity of electrons?

Give the order of magnitude of drift velocity of electrons in a metal.

When a current flows in a conductor, the order of magnitude of drift velocity of electrons thorugh it is

Two different wires X and Y of same diameter but different materials are joined in series across a battery. If the number density of electrons in X is twice that in Y, find the ratio of drift velocity of electrons in the two wires .

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

A wire with an area of cross-section as 1 mm2 has a resistance of 10Q, when a potential difference across its ends is 8V. Calculate the drift velocity of electrons. Given,number density of electrons in wire as 8 xx 10^20 electrons per cubic meter.