Q. When the light source is kept $20\ cm$ away from a photo cell, stopping potential $0.6\ V$ is obtained. When source is kept $40\ cm$ away, the stopping potential will be
A) $0.3\ V$
B) $0.6\ V$
C) $1.2\ V$
D) $2.4\ V$
Explanation
(b) Stopping potential does not depend on the relative distance between the source and the cell
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.