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Dual Nature of Radiation question

2022 · 26 Jun · Shift 2 · Q63
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Dual Nature of Radiation question

2022 · 26 Jun · Shift 2 · Q63

JEE MainPhysicsDual Nature of RadiationMCQ+4 / −1
A metal surface is illuminated by a radiation of wavelength 4500 Ao\mathop A\limits^oAo​. The ejected photo-electron enters a constant magnetic field of 2 mT making an angle of 90 ∘^\circ∘ with the magnetic field. If it starts revolving in a circular path of radius 2 mm, the work function of the metal is approximately :
  1. A
    1.36 eV
  2. B
    1.69 eV
  3. C
    2.78 eV
  4. D
    2.23 eV
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