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When a point source of light is at a distnace of 1 m from a photo cell, the cut off voltage is is found to be V. if the same source is placed at 3m distance from photo cell, the cut of voltage will beA. VB. `(V)/(2)`C. `V/4`D. `V/sqrt(2)` |
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Answer» Correct Answer - A By changing distance of source, photoelectric current charges. But there is not change in stopping potential. |
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