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

Options

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

B

Explanation

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`.