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

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
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  • A 0.4eV
  • B 2.5eV
  • C 3.0eV
  • D 7.0eV
Correct Answer: Option C
Explanation:
Work function = 5 - 2
= 3eV

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