GATE2016-1-38

Question

Two electric charges $q$ and $−2q$ are placed at $(0,0)$ and $(6,0)$ on the $x-y$ plane. The equation of the zero equipotential curve in the $x-y$ plane is

• A. $x=-2$
• B. $y=2$
• C. $x^{2}+y^{2}=2$
• D. $(x+2)^{2}+y^{2}=16$