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
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
- [IIT 2004]
- A
$ + ,\, - ,\, + ,\, - ,\, - ,\, + $
- B
$ + ,\, - ,\, + ,\, - ,\, + ,\, - $
- C
$ + ,\, + ,\, - ,\, + ,\, - ,\, - $
- D
$ - ,\, + ,\, + ,\, - ,\, + ,\, - $
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