A) \[i\propto {{d}^{2}}\]
B) \[i\propto d\]
C) \[i\propto \frac{1}{d}\]
D) \[i\propto \frac{1}{{{d}^{2}}}\]
Correct Answer: D
Solution :
Photoelectric current depends on the intensity of incident radiation, ie, \[i\propto I\] But, Intensity of radiation, \[I\propto \frac{1}{{{d}^{2}}}\] \[\therefore \] \[i\propto \frac{1}{{{d}^{2}}}\]
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