# Illustration Current-Voltage Graph for Photoelectric Effect

Get illustration

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material for any purpose, even commercially.

Sharing and adapting of the illustration is allowed with indication of the link to the illustration.

A photocurrent-voltage graph (I-V graph) resulting in the photoelectric effect when an accelerating voltage $$U_{\text B}$$ is used between the capacitor plates. The photocurrent $$I_{\text p}$$ is the electron current generated by the illumination of one of the capacitor plates.

As can be seen in the graph, the photocurrent goes into saturation with increasing accelerating voltage and reaches a maximum value $$I_{\text{max}}$$. In this state, all electrons are "sucked in" by the opposite capacitor plate.