1.when a monochromatic point soutce of light is at a distance of 0.2 m from a photoelectric cell,the cut-off voltage & the saturation current are respectively 0.6 volt & 18.0 mA.if the same source is placed 0.6m away from the photoelectric cell ,then the

1.stopping potential will be 0.2 volt

2.stopping potential will be 0.6 volt

3.saturation current will be 6.0 mA

4.saturation current will be 0.02 mA