Q. Six charges, three positive and three negative of equal magnitude are to be placed at the vertices of a regular hexagon such that the electric field at $O$ is double the electric field when only one positive charge of same magnitude is placed at $R.$ Which of the following arrangements of charges is possible for $P,Q,R,S,T$ and $U$ respectively
A) $+ , - , + , - , - , +$
B) $+ , - , + , - , + , -$
C) $+ , + , - , + , - , -$
D) $- , + , + , - , + , -$
Explanation
(d) If the charges are arranged according to the option (d), the electric fields due to $P$ and $S$ and due to $Q$ and $T$ add to zero, while due to $U$ and $R$ will be added up
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.