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  • When a monochromatic point source of light is at a distance of 0.2 m from a photoelectric cell, the stopping potential and saturation current are 0.8 V and 9.0 mA. If the same source is placed at 0

When a monochromatic point source of light is at a distance of 0.2 m from a photoelectric cell, the stopping potential and saturation current are 0.8 V and 9.0 mA. If the same source is placed at 0.6 m away from the photocell, then

 

Option: 1

The stopping potential will be 0.2 V and saturation current will be 1 mA
 


Option: 2

The stopping potential will be 0.8 V and saturation current will be 1 mA
 


Option: 3

The stopping potential will be 0.8 V and saturation current will be 9 mA
 


Option: 4

The stopping potential and saturation current will be both \frac{1}{3}rd of their initial value


Answers (1)

best_answer

Answer (2)

I\propto \frac{1}{r^2}\\ \\ \Rightarrow I=\frac{I_0}{9}

Posted by

Gautam harsolia

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