The radius of a conducting wire AB uniformly decreases from its one end A to another end B. It is connected across a battery. How will (i) electric field, (ii) current density, and (iii) mobility of electrons change from end A to end B ? Justify your answer in each case.

Question

TextDrift Velocity of Electrons in a ConductorMobility of Charge CarriersRelation Between Current and Drift VelocityCBSE PYQ

Similar Questions

Define 'current density'. Is it a scalar or a vector ? An electric field E is maintained in a metallic conductor. If n be the number of electrons (mass m, charge – e) per unit volume in the conductor and τ its relaxation time, show that the current density j = αE, where α = (ne²/m)τ.

TextDrift Velocity of Electrons in a ConductorRelation Between Current and Drift Velocity

Electrons drift with speed vd in a conductor with potential difference V across its ends. If V is reduced to V/2, their drift speed will become :

MCQ (Single)