Dual Nature Of Light Question 451
Question: When a point source of light is at a distance of one metre from a photo cell, the cut off voltage is found to be V. If the same source is placed at 2 m distance from photo cell, the cut off voltage will be
Options:
A) V
B) V/2
C) V/4
D) $ V/\sqrt{2} $
Show Answer
Answer:
Correct Answer: A
Solution:
[a] By changing distance of source photoelectric current changes. But there is no change in stopping potential.
BETA
