Variation of photoelectric current with collectorplate potential for different intensities ${\mathrm{l}}_1$ and ${\mathrm{l}}_2$ (such that ${\mathrm{l}}_1>{\mathrm{l}}_2$)at a fixed frequency is

Here for greater intensity ${\mathrm{l}}_1$, more photoelectrons are emitted and hence saturation current is more. Thus, graph corresponding to ${\mathrm{l}}_1$ will be above than that of ${\mathrm{l}}_2$. Since the stopping potential is independent of intensity, hence the graphs converge at sthe ame value of stopping potential ${\mathrm{V}}_{\mathrm{o}}$ for both the intensities ${\mathrm{l}}_1$ and ${\mathrm{l}}_2$.

Therefore, for fixed frequency and intensity of incident light, the photoelectric current increase in potential applied to the collector as shown in the graph