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NEET 2023 Physics and Chemistry Solved Paper Code F1

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Question : 2

Total: 100

The work functions of Caesium (Cs), Potassium (K) and Sodium (Na) are 2.14‌eV,2.30‌eV and 2.75‌eV respectively. If incident electromagnetic radiation has an incident energy of 2.20‌eV, which of these photosensitive surfaces may emit photoelectrons?

Both Na and K
K only
Na only
Cs only

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