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     EduGorilla 
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    Ultraviolet radiation of 6.2 eV falls on an aluminium surface (work function 4.2 eV). The kinetic energy of the faster electron emitted is approximately

    Options :-

    1. 3.2 × 10-15 J
    2. 3.2 × 10-17 J
    3. 3.2 × 10-19 J
    4. 3.2 × 10-21 J
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