Rankers Physics

P-N Junction Diode and its applications: Practice Problem & Solution

In a p-n junction photo cell, the value of the photo electromotive force produced by monochromatic light is proportional to: (2005, 2004)
The intensity of the light falling on the cell
The frequency of the light falling on the cell
The voltage applied at the p-n junction
The barrier voltage at the p-n junction

Solution Explained:

To solve this problem, we apply the core principles of P-N Junction Diode and its applications. Understanding the underlying formula is key to arriving at the correct answer below:

The photo-electromotive force generated in a photocell is directly proportional to the number of electron-hole pairs created per second. This pair generation rate depends strictly on the number of incident photons, which defines the intensity of the incident light.

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