Q. The stopping potential as a function of the frequency of the incident radiation is plotted for two different photoelectric surfaces $A$ and $B.$ The graphs show that work function of $A$ is
A) Grater than that of $B$
B) Smaller than that of $B$
C) Equal to that of $B$
D) No inference can be drawn about their work functions from the given graphs
Explanation
(b) From the given graph it is clear that if we extend the given graph for $A$ and $B,$ intercept of the line $A$ on $V$ axis will be smaller as compared to line $B$ means work function of $A$ is smaller than that of $B$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.