Prove that the current density of a metallic conductor is directly proportional to the drift speed of electron.

Prove that for a current carrying conductor current density is directly proportional to drift velocity.

The flow of the electric current through a metallic conductor is

Explain the construction and working of a moving coil galvanometer. Hence, show that a current flowing through it is directly proportional to the deflection.

A spherical solild of volume V is made of a material of density rho_(1) . It is falling through a liquid of density rho_(2)(rho_(2) lt rho_(1)) . Assume that the liquid applies a viscous froce on the ball that is proportional ti the its speed v, i.e., F_(viscous)=-kv^(2)(kgt0) . The terminal speed of the ball is

If the work function for a certain metal is 1.8eV: What is the maximum speed of the electron?

DC current flows in a metal piece of non-uniform cross-section. Which of these quantities remains constant along the conductor current, current density or drift speed? and Why?

Lights of two different frequencies whose photons have energies 1 and 2.5 eV, respectively, successively illuminate a metal whose work function is 0.5 eV. The ratio of the maximum speeds of the emitted electrons

Choose correct alternative. Given a current carrying wire of non-uniform cross section. Which of the following is constant throughout the length of the wire? A. current, electric field and drift speed B. drift speed only C. current and drift speed D. current only

Lights of two different frequencies whose photons have energies 1 eV and 2.5 eV respectively illuminate successively a metal surface whose work function is 0.7 eV. The ratio of the maximum speeds of the emitted electrons will have