Question

State three factors on which the rate of emission of electrons from a metal surface depends.

Answer 1

Rate of emission of electrons depend on the followings :

(A) Temperature of the surface :

More is the temperature of surface, more is the rate of emission of electrons and vice-versa.

(B) : Cross-section area of surface :

Larger is the cross-sectional area of surface, more is the rate of emission of electrons and vice-versa.

(C) : Type of metal :

More is the work function of the metal, less is the rate of emission of electrons and vice-versa.