Q. Photoelectric effect is maximum in
A) Cs
B) Na
C) K
D) Li
Explanation
(a)
Group first elements are so highly electropositive that they emit electron, even when exposed to light (photoelectric effect) and this character increases on moving down the group from lithium towards caesium
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.