Point charge q1=2μC and q2=−1 μC are kept at points x = 0 and x = 6 respectively. Electrical potential will be zero at points

Potential will be zero at two pointsAt internal point (M) : 14πε0×2×10−6(6−l)+(−1×10−6)l=0⇒l=2So distance of M from origin; x = 6 – 2 = 4At exterior point (N) : 14πε0×2×10−6(6−l')+(−1×10−6)l'=0⇒l′=6So distance of N from origin, x = 6 + 6 = 12