Q. Force of attraction between two point charges $Q$ and $–Q$ separated by $d\ meter$ is $F_{e}$. When these charges are placed on two identical spheres of radius $R = 0.3d$ whose centres and $d\ meter$ apart, the force of attraction between them is
A) Greater than $F_{e}$
B) Equal to $F_{e}$
C) Less then $F_{e}$
D) None of these
Explanation
(a) Separation between the spheres is not too large as compared to their radius so due to induction effect redistribution of charge takes place. Hence effective charge separation decreases so force increases
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.