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JAMB - Physics (1995 - No. 38)

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
7.0eV

Explicaţie

Work function = 5 - 2

= 3eV

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