A metal is illuminated with a radiation of energy 6.88eV If the kinetic energy of…

Physics WAEC 1990

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 checkmark
  • 8.38eV
  • 10.32eV

The correct answer is: C

Explanation

Work function = Total energy - kinetic Energy
= 6.88 - 1.50 = 5.38 ev
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