Photoelectric effect experiments are performed using three different metal plates p,q and r having work functions Qp=2.0 eV, Qq=2.5 eV and Qr=3.0 eV, are respectively. A light beam containing wavelength 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 450 nm [...]