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WAEC - Physics (2012 - No. 44)

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
3.0eV
4.0eV
7.0eV

説明

K.E = hf - Wo

= 4 - 3 = 1eV

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