JEE Main & Advanced
Physics
Photo Electric Effect, X- Rays & Matter Waves
Question Bank
Graphical Questions
question_answer
A point source of light is used in an experiment on photoelectric effect. Which of the following curves best represents the variation of photo current (i) with distance of the source from the emitter
A) a
B) b
C) c
D) d
Correct Answer:
D
Solution :
\[I\propto \frac{1}{{{d}^{2}}}\] and photo current \[i\propto I\] Þ \[i\propto \frac{1}{{{d}^{2}}}\]