Question

The stopping potential as a function of frequency of incident radiation is plotted for two different photo electric surfaces $A$ and $B$. The graphs show the work function of $A$ is:

• A. Greater than that of $B$
• B. Smaller than that of $B$
• C. Same as that of $B$
• D. No comparison can be done from given graphs

Answer 1

The correct option is B Smaller than that of $B$

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