WAEC - Physics (2012 - No. 44)
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
1.0eV
3.0eV
4.0eV
7.0eV
Paaiškinimas
K.E = hf - Wo
= 4 - 3 = 1eV
= 4 - 3 = 1eV