Which one of the following graphs represents correctly the variation of photoelectric current (i) with intensity (I) of incident radiations?

Explanation

Photoelectric current ∝ Intensity of incident light In the photoelectric effect, the photoelectric current is directly proportional to the intensity of the incident light. As the intensity of the incident radiation increases, the number of photons incident on the photoelectric material increases, leading to a greater number of photoelectrons being emitted and reaching the anode in the photoelectric cell. This results in an increase in the photoelectric current. When you plot the photoelectric current (i) on the y-axis and the intensity of the incident radiation (I) on the x-axis, the graph will be a straight line passing through the origin (0, 0). This linear relationship between the photoelectric current and the intensity of the incident radiation is a characteristic feature of the photoelectric effect. In the graph, you will see a straight line that represents the direct proportionality between the photoelectric current and the intensity of the incident radiation. As the intensity increases, the photoelectric current increases and the line on the graph shows this relationship in a linear fashion.