Question

Two point charges \(+2 \, \mu\text{C}\) and \(-2 \, \mu\text{C}\) are placed 0.1 m apart in air. What is the electrostatic force between them?

• A. \(3.6 \, \text{N}\)
• B. \(1.8 \, \text{N}\)
• C. \(4.2 \, \text{N}\)
• D. \(0.72 \, \text{N}\)

Hint:

Always convert microcoulombs (\( \mu\text{C} \)) to coulombs (\( \text{C} \)) before using Coulomb’s Law.