If the distance of 100 W lamp is increas...

If the distance of 100 W lamp is increased from a photo cell, the saturation current in the photo cell varies with distance d as:

`ipropd^(2)`

`ipropd`

`iprop(1)/(d)`

`iprop(1)/(d^(2))`

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The correct Answer is:

`iprop(1)/(d^(2))` (inverse square law)

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