If the distance of 100W point source is increased from a photocell, the saturation current ′i′ in the photo cell varies with distance ′d′ as
A
i∝d2
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B
i∝d
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C
i∝1d
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D
i∝1d2
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Solution
The correct option is Bi∝1d2 Number of electrons ejected per second is inversely proportional to the square of the distance between source and photocell. So, et∝1d2