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# Electric Charge: Coulomb's Law

Created by
@CheerfulGrossular

Attractive

### What is the value of Coulomb's constant in SI units?

8.99 x 10^9 N m^2 C^2

### What is the significance of the charge conservation principle?

The total electric charge in a closed system remains constant over time

### What is the mathematical representation of the charge conservation principle?

<p>ΔQ = Q_final - Q_initial</p> Signup and view all the answers

### What is the effect of increasing the distance between two point charges on the electrostatic force between them?

<p>The force decreases</p> Signup and view all the answers

### What is the direction of the electrostatic force between two point charges with the same sign?

<p>Repulsive</p> Signup and view all the answers

## Study Notes

### Electric Charge

#### Coulomb's Law

• Describes the electrostatic force between two point charges
• Mathematically represented as: F = k * (q1 * q2) / r^2
• Where:
• F is the electrostatic force between the two charges
• k is Coulomb's constant (approximately 8.99 x 10^9 N m^2 C^2)
• q1 and q2 are the magnitudes of the two point charges
• r is the distance between the centers of the two charges
• The force is:
• Attractive if the charges are opposite in sign
• Repulsive if the charges are the same sign

#### Charge Conservation

• The total electric charge in a closed system remains constant over time
• Charge cannot be created or destroyed, only transferred from one object to another
• Mathematically represented as: ΔQ = Q_final - Q_initial = 0
• Where:
• ΔQ is the change in total charge
• Q_final is the final total charge
• Q_initial is the initial total charge
• Charge conservation is a fundamental principle in physics, applicable to all physical processes

### Coulomb's Law

• Describes the electrostatic force between two point charges
• Electrostatic force (F) is directly proportional to the product of the magnitudes of the two charges (q1 and q2)
• Electrostatic force (F) is inversely proportional to the square of the distance (r) between the centers of the two charges
• F = k * (q1 * q2) / r^2, where k is Coulomb's constant (approximately 8.99 x 10^9 N m^2 C^2)
• Force is attractive if charges are opposite in sign and repulsive if charges are the same sign

### Charge Conservation

• The total electric charge in a closed system remains constant over time
• Charge cannot be created or destroyed, only transferred from one object to another
• ΔQ = Q_final - Q_initial = 0, where ΔQ is the change in total charge
• Charge conservation is a fundamental principle in physics, applicable to all physical processes

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## Description

Understand Coulomb's Law, which describes the electrostatic force between two point charges, and learn how to calculate the force with the given formula.

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