JEE Main & Advanced
Physics
Photo Electric Effect, X- Rays & Matter Waves
Question Bank
Self Evaluation Test - Dual Nature of Radiation and Matter
question_answer
A point source causes photoelectric effect from a small metal plate. Which of the curves in Fig may represent the saturation photo - current as a function of the distance between the source and the metal?
A)A
B)B
C)C
D)D
Correct Answer:
D
Solution :
[d] Saturation current is inversely proportional to the square of distance of cathode from point source.