Physics - Semiconductors Question with Solution | TestHub

In a photodiode, the magnitude of the reverse saturation current (photocurrent) is directly proportional to the intensity of incident light.

The given graph shows the I-V characteristics in reverse bias for different illumination intensities. The magnitude of the reverse current is represented by the downward displacement from the horizontal axis.

From the graph, the magnitude of the reverse current is maximum for the curve labeled ${\mathrm{I}}_4$.

Therefore, the intensity of illumination is maximum for ${\mathrm{I}}_4$, which means ${\mathrm{I}}_4>{\mathrm{I}}_3>{\mathrm{I}}_2>{\mathrm{I}}_1$.

Answer: ${\mathrm{I}}_4$