1. Magnitude of the Charges:
* The greater the magnitude of the charges, the stronger the electric force. This is because the force is directly proportional to the product of the charges.
2. Distance Between the Charges:
* The closer the charges are, the stronger the electric force. This is because the force is inversely proportional to the square of the distance between the charges.
3. Medium Between the Charges:
* The electric force is also influenced by the medium between the charges. This is because different materials have different permittivities, which affect the force. In general, the electric force is weaker in a medium with a higher permittivity compared to a vacuum.
Coulomb's Law
These factors are summarized in Coulomb's Law, which states:
F = k * (q1 * q2) / r²
where:
* F is the electric force between the charges
* k is Coulomb's constant (approximately 8.98755 × 10⁹ N⋅m²/C²)
* q1 and q2 are the magnitudes of the charges
* r is the distance between the charges
Key Points:
* Like charges repel, while unlike charges attract.
* The force is always directed along the line joining the two charges.
* The electric force is a fundamental force in nature and plays a crucial role in various phenomena, including chemical bonding, electricity, and magnetism.
Example:
If you double the distance between two charges, the electric force between them will decrease by a factor of four. This is because the force is inversely proportional to the square of the distance.
