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Circuit diagram & commonly used symbols

when a point ...

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when a point source of monochromatic light is at a distanceof 0.2m from a photo electric cell,the cut-off voltage and the saturation current are 0.6 volt and 18mA respectively.If the same source is placed 0.6m away from the photoelectric cell then find the new stoping potential and saturation current .

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Q. When a point source of monochromatic light is at a distance of 0.2m from a photoelectric cell, the cut-off voltage and the saturation current are 0.6 volt and 18 mA respectively. If the same source is placed 0.6 away from the photoelectric cell, then

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