Electrostatic Force Calculator (Three Charges)
Electrostatic force is a fundamental concept in physics, describing the force between two charged particles. In this guide, we’ll explore how to calculate the electrostatic force between three charges, a crucial aspect of understanding and working with electric fields.
How to Use This Calculator
- Enter the values for the three charges (Q1, Q2, Q3) and the distances between them (d12, d13, d23).
- Click the “Calculate” button.
- View the results below the calculator.
Formula & Methodology
The electrostatic force between two charges is given by Coulomb’s law: F = k * (|Q1*Q2| / r^2), where k is Coulomb’s constant, Q1 and Q2 are the charges, and r is the distance between them. For three charges, we calculate the force between each pair and sum them up.
Real-World Examples
Data & Statistics
| Source | Value (N m² C⁻²) |
|---|---|
| CODATA (2018) | 8.987551792 × 10⁹ |
| NIST (2021) | 8.987551792 × 10⁹ |
| Charge (Q) (C) | Distance (r) (m) | Force (F) (N) |
|---|---|---|
| 1 × 10⁻⁶ | 1 | 8.987551792 × 10⁶ |
| 1 × 10⁻⁶ | 10 | 8.987551792 × 10⁵ |
Expert Tips
- Always use consistent units for charges (Coulombs) and distances (meters).
- Be cautious with large charges and small distances, as forces can be very strong.
- Consider using a logarithmic scale for your chart to better visualize small forces.
Interactive FAQ
What is Coulomb’s constant?
Coulomb’s constant, often denoted by the symbol k, is a physical constant that appears in Coulomb’s law, which describes the force between two charged particles.
How does the calculator handle negative charges?
The calculator treats negative charges the same as positive ones. The force is always attractive, so the sign of the charge doesn’t matter.
NIST – Electromagnetism and Electricity
Physics Classroom – Electricity