List of top Physics Questions on Drift Velocity asked in CBSE CLASS XII

Establish the relation between drift velocity of electrons (\(v_d\)) and electric current (\(I\)) in a conductor.
How is \(v_d\) affected when the length of the conductor is doubled, keeping the voltage applied across the conductor constant?
An electric field \(E\) is established across the ends of a cylindrical conductor of length \(L\) and area of cross-section \(A\). Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.
This ‘average velocity’ is found to be only a few mm/s for currents in the range of a few amperes. How then is current established almost the instant a circuit is closed?
Two copper wires having their radii in the ratio of \(3:2\) are connected in series across a battery. Find the ratio of the drift velocities of the electrons in the wires.
What is the order of magnitude of drift velocity of electrons in a conductor ? Deduce the relation between the current flowing through a conductor and drift velocity of electrons in it.
An electric field \(E\) is established across the ends of a cylindrical conductor of length \(L\) and area of cross-section \(A\). Discuss how electrons attain an average velocity, independent of time. Hence, obtain a relation between current in the conductor and this ‘average velocity’ of electrons.
This ‘average velocity’ is found to be only a few mm/s for currents in the range of a few amperes. How then is current established almost the instant a circuit is closed?
Two copper wires having their radii in the ratio of \(3:2\) are connected in series across a battery. Find the ratio of the drift velocities of the electrons in the wires.
What is the order of magnitude of drift velocity of electrons in a conductor ? Deduce the relation between the current flowing through a conductor and drift velocity of electrons in it.
A copper wire of uniform cross-sectional area carries a current of 3.4 A. The drift velocity of conduction electrons is 0.2 mm/s. If the number density of electrons in copper is \(8.5 \times 10^{28} \, \text{m}^{-3}\), find the area of cross-section of the wire.
What is the difference between ‘velocity’ and ‘drift velocity’ of electrons in a current-carrying conductor.
A conductor of length l and area of cross-section A is connected across an ideal battery of emf V . Derive the formula for the current density in terms of relaxation time τ
Define the term 'drift velocity' of conduction electrons in a conductor.
When electrons drift in a conductor from lower to higher potential, does it mean that all the ‘free electrons’ of the conductor are moving in the same direction?