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Stopping Potential vs Frequency

A source of l...

Question

A source of light is placed at a distance $4 m$ from a photocell and the stopping potential is then 7.7 volt. If the distance is halved, the stopping potential now will be:

A

7.7 volt

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B

15.4 volt

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C

3.85 volt

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D

1.925 volt

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Solution

The correct option is C 7.7 volt
Stopping potential is independent of distance between light source and photocell. So, stopping potential will be 7.7 volt only.

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