Answer to Question #171039 in Physics for Iman

Question

A -12.0 uC charge is between two 6.0 uC charges, 5.0 cm away from each. What electric force keeps the central charge in equilibrium????

Answer 1

In equilibrium $|\vec F_1|=|\vec F_2|\to$

$|\vec F_1|=k\frac{q_1q}{x^2}=9\cdot10^9\cdot\frac{12\cdot10^{-6}\cdot6\cdot10^{-6}}{0.05^2}=259.2\ (N)$

$F_{net}=|\vec F_1|-|\vec F_2|=0$