Coulomb's Law Lesson Plan

🔖 Topics

• Coulomb’s law

🎯 Objectives

• Calculate the forces on point charges using Coulomb’s law

📋 Sequence

• 🟢 Definition of Coulomb’s law
• 🟣 Attraction of Two Opposite Charges
• 🟣 Repulsion of Two Like Charges
• 🟣 Point of No Force Between Two Charges
• 🟢 Comparison of electric force to gravitational force

🖥️ Animations, Simulations, Activities

N/A

📝 Practice Problems

1. Two point charges, each with a charge of +1.5 mC are separated by a distance of 5.75 m. What is the magnitude of the electric force between the point charges? Do they attract or repel each other?

2. A point charge of +15 $\mu C$ is located at the point (1 m, 2 m). Another point charge of -15 $\mu C$ is located at the point (0 m, -5 m). What is the electric force acting on the negative point charge from the positive one?

3. If the electrical force of repulsion between a pair of one Coulomb charges is 10 N, how far apart are they (Saha, 2015)?

✅ Partial Solutions

1. 612.48 N, Repel
2. 0.0405 N, $81.87^{\circ }$
3. 30,000 m

📘 Connected Resources

Saha, A. (2015). Electric Charge, Force, and Field Problems (Practice Questions). Physics and Astronomy Ancillary Materials. https://oer.galileo.usg.edu/physics-ancillary/2