The number of photo-electrons emitted per second from a metal surface increases when:

The curve between current $(i)$ and potential difference $(V)$ for a photo cell will be:

On a photosensitive surface, if the intensity of incident radiation is increased, the stopping potential

From the photoelectric effect experiment, the following observations are made. Identify which of these are correct:
$A.$ The stopping potential depends only on the work function of the metal.
$B.$ The saturation current increases as the intensity of incident light increases.
$C.$ The maximum kinetic energy of a photoelectron depends on the intensity of the incident light.
$D.$ The photoelectric effect can be explained using the wave theory of light.
Choose the correct answer from the options given below:

Photo cells convert

Which phenomena can be explained by using the particle nature of light?