Question

Two particles A and B having charges of + 2.00 x 10^-6C and of -4.00x10^-6C respectively are held fixed at a separation of 20 0 cm. Locate the point(s) on the line AB where (a) the electric field is zero (b) the electric potential is zero.

Answer 1

q₂ = 2 × 10^–6 C, q₁² = – 4 × 10^–6 C, r = 20 cm = 0.2 m
(E₁ = electric field due to q₁, E₂ = electric field due to q₂)