When a monochromatic point source of light is at a distance
of 0.2 m from a photoelectric 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 2.0 mA

Options

A. the stopping potential will be `0.2V`
B. the stopping potential will be `1.8 V`
C. the saturation current will be `6.0 mA`
D. the saturation current will be `2.0mA`

Answer

D