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When a monochromatic point source of lig...

When a monochromatic point source of light is at a distance of 0.2 m from a photoelectric cell, the cut-offf voltage and the saturation current are respectively 0.4 V and 12 mA. If the same source is placed 0.4 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 4.0 mA

D

the saturation current will be 3 mA

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The correct Answer is:
D
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