WAEC - Physics (1990 - No. 57)
A metal is illuminated with a radiation of energy 6.88eV If the kinetic energy of the emitted electrons is 1.5OeV, calculate the work function of the metal.
0.22eV
4.59eV
5.38eV
8.38eV
10.32eV
Selitys
Work function = Total energy - kinetic Energy
= 6.88 - 1.50 = 5.38 ev
= 6.88 - 1.50 = 5.38 ev