Two positive charges each are fixed at points and

PHYSICS · Subjective · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two positive charges +q+q each are fixed at points (−a,0)(-a,0) and (a,0)(a,0). A third charge +q+q is placed at the origin. Corresponding to a small displacement of +q+q in the direction mentioned in Column I, match the corresponding equilibrium in Column II.
Column IColumn II
(a) Along the positive xx-axis(p) Stable equilibrium
(b) Along the positive yy-axis(q) Unstable equilibrium
(c) Along the positive zz-axis(r) Neutral equilibrium
(d) Along the line x=yx=y(s) No equilibrium

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