Coulomb's Law Calculator for ±5µC Charges 0.1m Apart
Determines the attractive force between equal and opposite 5 microcoulomb charges placed 10 centimeters apart.
Calculate the magnitude of the electrostatic force between two charged particles using Coulomb's Law. Enter your Charge 1, Charge 2, Distance Between Charges to get an instant electrostatic force. Formula: 8.99e9 * abs(charge1 * charge2) / pow(distance, 2).
Electrostatic Force
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How It Works
How It Works
This calculator uses Coulomb’s Law to find the electric force between two charged particles. You enter the values of both charges in coulombs and the distance between them in meters.
The calculator multiplies the two charges together, takes the absolute value, and then multiplies by Coulomb’s constant (8.99 × 10^9). It then divides this result by the square of the distance between the charges to give the force in newtons.
- Multiplies Charge 1 by Charge 2
- Uses the absolute value to find the force magnitude
- Divides by the distance squared
- Multiplies by 8.99 × 10^9 (Coulomb’s constant)
Understanding the Results
The result shows the magnitude of the electrostatic force between the two charges in newtons (N). A larger value means a stronger force between the particles.
If the charges are large or very close together, the force will increase. If the charges are small or far apart, the force will decrease.
- Output is measured in newtons (N)
- Greater charges produce stronger forces
- Shorter distances greatly increase the force
- The value represents force strength only (not direction)
Frequently Asked Questions
What does this Coulomb's Law calculator compute?
This calculator computes the magnitude of the electrostatic force between two charged particles using Coulomb’s Law. It applies the formula 8.99 × 10^9 × |q1 × q2| / r² to determine the force in Newtons. The result represents how strongly the two charges attract or repel each other.
When should I use this calculator?
Use this calculator when you need to determine the electric force between two point charges separated by a known distance. It is commonly used in physics problems involving electrostatics, electric fields, or charge interactions. Make sure your charges are in Coulombs and distance is in meters for accurate results.
Does the calculator show whether the force is attractive or repulsive?
No, this calculator returns only the magnitude of the electrostatic force. Because the formula uses the absolute value of the product of the charges, the result is always positive. Opposite charges attract and like charges repel, but this tool reports only the strength of the force.
What units should I enter for the charges and distance?
You must enter both charges in Coulombs (C) and the distance between them in meters (m). If your values are in microcoulombs or centimeters, convert them before entering. Using incorrect units will lead to incorrect force calculations.
Why does the force increase so much when the distance decreases?
Coulomb’s Law states that force is inversely proportional to the square of the distance between charges. This means if you halve the distance, the force increases by a factor of four. Small changes in distance can therefore cause large changes in force.
Can I use this calculator for very small particles like electrons?
Yes, the calculator works for any two point charges as long as you provide their charge values in Coulombs and the separation distance in meters. For example, you can calculate the force between two electrons using their known charge value (approximately 1.602 × 10^-19 C). Just ensure the distance is not zero to avoid division by zero errors.
Disclaimer
This calculator provides estimates for informational purposes only. It is not professional advice. Verify results with a qualified professional. Disclaimer.