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.

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.

A 0.22eV
B 4.59eV
C 5.38eV
D 8.38eV
E 10.32eV

waec 1990 physics

The correct answer is C. 5.38eV

Work function = Total energy - kinetic Energy

= 6.88 - 1.50 = 5.38 ev

Previous question Next question