Dual Nature Of Radiation

Photoelectric effect experiments are performed using three different metal plates p, q and r having work functions \(\phi_p=2.0~\mathrm{eV}\), \(\phi_q=2.5~\mathrm{eV}\) and \(\phi_r=3.0~\mathrm{eV}\), respecticely. A light beam containing wavelengths of 550 nm, 450 nm and 350 nm with equal intensities illuminates each of the plates. The correct I-V graph for the experiment is (Take hc = 1240 eV nm)