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wjhen a chromatic source of light is at a distance of 0.2 m from a photoelectric cell the cut off voltage and the saturation current respectively are 0.6 V and 18mA. If the same source is placed o.6 m away from the cell then the saturation current will be?

wjhen a chromatic source of light is at a distance of 0.2 m from a photoelectric cell the cut off voltage and the saturation current respectively are 0.6 V and 18mA. If the same source is placed o.6 m away from the cell then the saturation current will be?

Grade:12

1 Answers

Vikas TU
14149 Points
5 years ago
COMPARING to the Intensity formulae
it is inversely prop. to the square of the distance .
Thus,
18 = k/(0.2)^2
I = k/(0.6)^2
divide them and get II.

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