Question

If the intensity of radiation incident on a photocell be increased four times, then the number of photoelectrons and the energy of photoelectrons emitted respectively become

• A. Four times, doubled
• B. Doubled, remains unchanged
• C. Remains unchanged, doubled
• D. Four times, remains unchanged

Answer 1

Answer: (D)

As the intensity increases the number of photon striking on the surface increases hence the number of photo electrons emitted increases where as the energy of incident photons remains same and hence the kinetic energy of emitted photo electrons remains same.