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Structure of Atom question

2019 · 12 Jan · Shift 1 · Q19
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Structure of Atom question

2019 · 12 Jan · Shift 1 · Q19

JEE MainChemistryStructure of AtomMCQ+4 / −1
What is the work function of the metal if the light of wavelength 4000 A∘\mathop A\limits^ \circA∘​ generates photoelectrons of velocity 6 ×\times× 105 ms–1 from it ? (Mass of electron = 9 ×\times× 10–31 kg; Velocity of light = 3 ×\times× 108 ms −-− 1 Plank's constant = 6.626 ×\times× 10–34 Js; Charge of electron = 1.6 ×\times× 10–19 JeV–1)
  1. A
    4.0 eV
  2. B
    0.9 eV
  3. C
    2.1 eV
  4. D
    3.1 eV
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