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If the intensity of the radiation incident on a photo-sensitive plate is doubled, how does the stopping potential change?

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in Physics – Class 12 by (135k points)
If the intensity of the radiation incident on a photo-sensitive plate is doubled, how does the stopping potential change?

(a) Increases

(b) Decreases

(c) No effect

(d) Infinite

I have been asked this question in final exam.

This interesting question is from Einstein’s Photoelectric Equation : Energy Quantum of Radiation in portion Dual Nature of Radiation and Matter of Physics – Class 12

1 Answer

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Best answer
Correct option is (c) No effect

Easiest explanation: No effect. This is because the intensity of radiation incident on a photo-sensitive plate is independent on stopping potential. So, the stopping potential remains the same, even if the intensity is doubled.

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