KVPY SX SB Exam 2013 Question Paper

In a photocell circuit the stopping potential, ${\mathrm{V}}_0$, is a measure of the maximum kinetic energy of the photoelectrons. The following graph shows experimentally measured values of stopping potential versus frequency v of incident light. The values of Planck’s constant and the work function as determined from the graph are (taking the magnitude of electronic charge to be $\mathit{e}=1.6\times {10}^{-19}\mathit{C}$)