Q.
The figure shows a plot of photo current versus anode potential for a photo sensitive for three different radiations. Which one of the following is a correct statement
A) Curves $(a)$ and $(b)$ represent incident radiations of different frequencies and different intensities
B) Curves $(a)$ and $(b)$ represents incident radiations of same frequency but of different intensities
C) Curves $(b)$ and $(c)$ represent incident radiations of different frequencies and different intensities
D) Curves $(b)\ $and$\ (c)$ represent incident radiations of same frequency having same intensity
Explanation
(b) Stopping potential is same for $a\ \&\ b,$ hence their frequencies are same. Also maximum current values are different for $a\ \&\ b$ so they will have different intensities
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.