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InterviewSolution
| 1. |
If the intensity of the incident radiation in a photo cell is increased, how does the stopping potential vary? |
| Answer» <p>The number of photoelectrons emitted per second from a photosensitive plate is directly proportional to theintensity of the incident radiation. The minimum negativepotentialapplied at the anode at which thephotoelectriccurrent becomes zero is calledstopping potentialor cut-offpotential</p><p>Intensityin photoelectriceffectdeals with the number of photons attacking electrons to produce current. It does noteffectthe kinetic energy of electrons. Hencestopping potentialof anode remains unchanged</p> | |