When a point source of monochromatic light is at a distance of 0.2 m from a photoelectric?
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When a point source of monochromatic light is at a distance of 0.2 m 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 m away from the photoelectric cell, then [IIT JEE 1992; MP PMT 1999]
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