Question

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. Greater 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

Answer 1

Answer: (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 $B$