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 ________
A. The stopping potential will be 0.2 V
B. The stopping potential will be 0.6 V
C. The saturation current will be 6 mA
D. The saturation current will be 18 mA
Answer:A
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 ________
A. The stopping potential will be 0.2 V B. The stopping potential will be 0.6 V C. The saturation current will be 6 mA D. The saturation current will be 18 mA