When light of suitable frequency is incident on a photosensitive material, photo electrons are ejected and photoelectric current flows. If the intensity of the incident light is increased, then
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → The saturation current will increase
According to Einstein’s photoelectric equation:
$K_{max} = h\nu - \phi$
- $K_{max}$ (maximum kinetic energy of photoelectrons) depends only on the frequency $\nu$ of incident light and the work function $\phi$, not on intensity. - Stopping potential also depends only on $K_{max}$, so it remains unchanged. - Saturation current is directly proportional to the number of photoelectrons emitted, which increases with intensity of light.
Correct Answer: The saturation current will increase