When a monochromatic point-source of light is at a distance of 0.2 m from a photo-electric cell, the
cut-off voltage and the saturation current are respectively 0.6 V and 18'0 mA. 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 6'0 mA

• D

   the saturation current will be 3'0 mA