Answer to Question #312382 in Electric Circuits for BxJ

Question

Two identical point charges, 10 cm apart in air, repel each other with a force of 1 newton. Find the magnitude of each charge.

Answer 1

Force

$F=\frac{kq_1q_2}{r^2}$

$1=\frac{9\times 10^9 \times q_1q_2}{0.1^2}$

$q^2=\frac{0.1^2}{9\times10^9}$

$q=1.05\times10^{-6}C$

$q_1=q_2=q=1.05\times10^{-6}C$