Question: What is the force between two charges of +1 µC and +1 µC separated by 0.1 m?
Options:
Correct Answer: 0.18 N
Solution:
F = k * |q1 * q2| / r² = (8.99 x 10^9 N m²/C²) * (1 x 10^-6 C)² / (0.1 m)² = 0.09 N.