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Olympiad workbookNSEPDual Nature of Matter

A source emits photons of energy 5 eV which are incident on a metallic sphere of work function 3.0 eV . The radius of the sphere is r =8 10⁻³ ~m . It is observed that after some time emission of photoelectrons from the metallic sphere is stopped. Charge on the sphere when the photoemission stops is.

Options

  1. A1.77 10⁻¹⁶ C
  2. B1.77 10⁻¹² C
  3. C1.11 10⁻¹² C
  4. D1.11 10⁻¹⁰ C

Correct answer

B. 1.77 10⁻¹² C

Step-by-step solution

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