In the arrangement shown in fig. two positive charges, `+Q` each,are fixed. Mark the correct statement(s) regarding a third charged particle `-q` place at the midpoint P that can be displaced along or perpendicular to the line connecting the charges.

Explanation

(a) There is always a restoring force toward its original position. The particle (negative charge) will perform oscillation. (the case of stabel equilibrium.)

(b) Let negative chage be displaced towaed charge(1). then `vec(F)` will be more than `vec(F)`. The negative charge will experience net force toward charge (1) or in the direction of its displacement. The negative charge is under ustable equilbrium.