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Question

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

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Solution

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.

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