A metal with a work function of 3.0ev is irradiated with ultraviolet light of energy…

Physics WAEC 2012

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 checkmark
  • 3.0eV
  • 4.0eV
  • 7.0eV

The correct answer is: A

Explanation

K.E = hf - Wo

= 4 - 3 = 1eV
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