Problem

In a photoelectric effect experiment. If

f

is the frequency of radiations incident on the metal surface and

I

is the intensity of the incident radiations, then match the following columns.

Column I	Column II
(a) If $f$ is increased keeping $I$ and work-function constant	(p) Stopping potential increases
(b) If distance between cathode and anode is increased	(q) Saturation current increases
(c) If $I$ is increased keeping $f$ and work-function constant	(r) Maximum kinetic energy of photoelectron increases
(d) Work-function is decreased keeping $f$ and $I$ constant	(s) Stopping potential remains same