question_answer

When a monochromatic point source of light is at a distance of 0.1 m from a photoelectric cell, the cut-off voltage and the saturation current are respectively 0.9 V and 90 mA. If the same source is placed 0.3 m away from the cell, then:

[A] The stopping potential will be 0.9 V

[B] The stopping potential will be 0.3 V

[C] The saturation current will be 30 mA

[D] The saturation current will be 10 Ma

A) A, C                 

B) B, C

C) A, D                             

D) B, D