With respect to photoelectric effect experiment. Match the entries Column I with the entries of Column II

	Column I		Column II
I.	If  $f$(frequency) is increased keeping $I$ (intensity) and $\varphi$ (work function) constant	a.	Stopping potential increases
II.	If $I$ is increased keeping $fand\varphi$ constant	b.	Saturation photocurrent, increases
III.	If the distance between anode and cathode increases	c.	Maximum KE of the photoelectrons increases
IV.	If  $\varphi$  is decreased keeping $fandI$ constant	d.	Stopping potential remains the same

 

$i\to a,c;ii\to b,d;iii\to d,;iv\to a,c$

i) .From ${}_{e}V_0=hf-\varphi and{K}_{\max }=hf-\varphi$ If $f$ increases keeping $\varphi$ constant, then $V_{0}and{K}_{\max }$ increases

ii)         If $I$ increases, more photons/time are incident on the metal surface and more photoelectrons would be liberated . Hence, saturation photocurrent increases. Stopping potential and $K_{\max }$ will remain the same

iii) If separation between cathode and anode is increased, then their is no effect on $V_{0,}{K}_{\max }$ or current

iv) If $\varphi$ decreases keeping $fandI$  constant, then $V_{0}and{K}_{\max }$ increases