A metal with a work function of 3 0ev is irradi... - WAEC Physics 2012 Question
A metal with a work function of 3.0ev is irradiated with ultraviolet light of energy 4.0 ev. The kinetic energy of the ejected electron is
A
1.0eV
B
3.0eV
C
4.0eV
D
7.0eV
correct option: a
K.E = hf - Wo
= 4 - 3 = 1eV
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