Question

Work function of metal is
(a) the minimum energy required to free an electron from surface against coulomb forces.
(b) the minimum energy required to free an », nucleon.
(c) the minimum energy to ionise an atom.
(d) the minimum energy required to eject an electron orbit.

Answer 1

Answer:

(a) Work function of metal is the minimum energy required to free electrons from surface against couloumb forces

[Note that this energy doesn't provide any kinetic energy or momentum to electron, which is achieved by providing additional energy]

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