Same frequency but different Intensity The stopping potential is constant as there is no change in freq : eVs = hf - hfo. DO not be alarmed where the stopping potential axis is. Can be in the positive axis as it is defined as stopping (negative wrt the photoelectric substance) . As intensity increase the energy increase but the photon energy is constant (E=hf) . Hence the number of photons incident on plate increases and number of photoelectrons emitted increases and photocurrent increases. Note: Photocurrent warrants you to talk about the number per second.