A light of energy 5eV falls on a metal and the electrons with a maximum…

Physics JAMB 1995

A light of energy 5eV falls on a metal and the electrons with a maximum kinetic energy of 2eV are ejected. The work function of the metal is

  • 0.4eV
  • 2.5eV
  • 3.0eV checkmark
  • 7.0eV

The correct answer is: C

Explanation

Work function = 5 - 2

= 3eV
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