PHYIC CALCULATOR
Coulomb’s Law Calculator
A precise tool.
What is the Coulomb’s Law Calculator & How does it work?
Coulomb’s Law describes the electrostatic force between two point charges. The magnitude of this force is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.This law is fundamental in understanding how charged particles interact with each other at a distance. It was formulated by Charles-Augustin de Coulomb and is widely used in physics and engineering.
F = k cdot frac{q_1 cdot q_2}{r^2}
F = electrostatic force, k = Coulomb’s constant (approximately 9.0 times 10^9 Ncdot m^2/C^2), q_1, q_2 = magnitudes of the charges in coulombs, r = separation distance between the charges in meters.
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Frequently Asked Questions
What is Coulomb’s constant in Coulomb’s Law?
Coulomb’s constant (k) is approximately 9.0 × 10^9 N·m²/C².
How do I calculate the electrostatic force between two charges?
Use the formula F = k · (q₁ · q₂) / r², where F is the force, q₁ and q₂ are the charges, and r is the distance between them.
What units should I use for the charges in Coulomb’s Law?
The charges (q₁ and q₂) should be in coulombs (C).
How does the distance affect the electrostatic force?
The force is inversely proportional to the square of the distance (r²), meaning as distance increases, the force decreases significantly.
Can I use this calculator for charges with different signs?
Yes, you can. The sign of the charges will determine whether the force is attractive or repulsive.
What happens to the force if one of the charges is zero?
If either charge is zero, the electrostatic force will be zero.
Is Coulomb’s Law applicable for all types of forces between objects?
No, Coulomb’s Law specifically applies to electrostatic forces between point charges. It does not account for other types of forces like gravitational or magnetic forces.
Results are for informational purposes only and do not constitute professional advice.