If the intensity of incident light is increased for a photosensitive surface while frequency remains above threshold, which quantity definitely increases according to the notes? 
AMaximum kinetic energy of emitted electrons
BStopping potential
CNumber of photoelectrons emitted per second
DWork function
Answer & Solution
Correct answer: C. Number of photoelectrons emitted per second
The notes state that kinetic energy depends on frequency and is independent of intensity. Higher intensity means more photons striking per second, so more electrons are emitted per second, increasing the photoelectric current.
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