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NEET 2001 (AIPMT) · Photoelectric Experiment: Intensity, Stopping Potential & Graphs

Photoelectric Experiment: Intensity, Stopping Potential & Graphs question from NEET 2001 (AIPMT)

Q82NEET 2001 · AIPMTEasy

Photoelectric Experiment: Intensity, Stopping Potential & Graphs

A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance become d/2, then number of electrons emitted per second, will be

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Answer: (b)

$I \propto \frac{1}{d^2}$ and electrons emitted per second $\propto I$ .
$d \to d/2 \Rightarrow I' = 4I$ .
So the answer is (b) four times.

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