Coulomb Examples: Static Electricity and Particle Physics

📚 Quick Study Guide

• ⚡ Coulomb's Law: Describes the electrostatic interaction between electrically charged particles.
• 🔢 Formula: $F = k \frac{|q_1q_2|}{r^2}$, where $F$ is the electrostatic force, $k$ is Coulomb's constant, $q_1$ and $q_2$ are the charges, and $r$ is the distance between the charges.
• 🧪 Coulomb's Constant: $k ≈ 8.9875 × 10^9 N⋅m^2/C^2$.
• ➕ Like Charges: Repel each other.
• ➖ Opposite Charges: Attract each other.
• ⚛️ Application in Particle Physics: Used to understand interactions between charged subatomic particles.
• 📏 Units: Charge is measured in Coulombs (C), distance in meters (m), and force in Newtons (N).

Practice Quiz

1. What does Coulomb's Law describe?
   1. The gravitational force between two masses
   2. The electrostatic force between two charges
   3. The magnetic force between two magnets
   4. The strong nuclear force between two nucleons
2. What is the effect on the electrostatic force if the distance between two charges is doubled?
   1. The force is doubled
   2. The force is halved
   3. The force is quadrupled
   4. The force is reduced to one-fourth
3. What is the unit of electric charge in the SI system?
   1. Ampere
   2. Volt
   3. Coulomb
   4. Ohm
4. If two positive charges are brought closer, what happens to the electrostatic force between them?
   1. The force decreases
   2. The force increases
   3. The force remains the same
   4. The force becomes zero
5. In Coulomb's Law, what does 'k' represent?
   1. Gravitational constant
   2. Boltzmann constant
   3. Coulomb's constant
   4. Planck's constant
6. Two charges, +q and -q, are separated by a distance r. If the magnitude of each charge is doubled, what happens to the electrostatic force?
   1. It remains the same
   2. It doubles
   3. It quadruples
   4. It halves
7. Which of the following is NOT an application of Coulomb's Law?
   1. Understanding chemical bonding
   2. Calculating the force between protons in a nucleus
   3. Designing electric circuits
   4. Describing gravitational interactions between planets