クーロンの法則計算機

共有リンク

はじめに

Coulomb's Law Calculator — Electrostatic force between two point charges. Enter Charge 1 (C), Charge 2 (C), Distance (m) to get an instant, accurate result.

計算式

Coulomb's law: F = k × q1 × q2 / r², where k ≈ 8.99 × 10⁹ N·m²/C².

ステップごとの説明

Enter the Charge 1 (C).
Enter the Charge 2 (C).
Enter the Distance (m).
Click Calculate to see your result instantly.

実例

Example: With Charge 1 (C) = 0.001, Charge 2 (C) = 0.002, Distance (m) = 0.5, the Coulomb's Law Calculator gives Force N: 71900.4143.

よくある質問

What does a negative force result mean?

Opposite-sign charges attract, which this calculator shows as a negative force magnitude relative to same-sign repulsion.

How does distance affect the force?

The force follows an inverse-square law — doubling the distance reduces the force to a quarter.

What inputs does the Coulomb's Law Calculator need?

You'll need to provide: Charge 1 (C), Charge 2 (C), Distance (m). All fields use sensible defaults, so you can see a working example immediately and then adjust the values to match your own numbers.

How accurate is the Coulomb's Law Calculator?

The Coulomb's Law Calculator applies the formula exactly as calculated — Coulomb's law: F = k × q1 × q2 / r², where k ≈ 8.99 × 10⁹ N·m²/C². — so results are precise for the inputs you provide. Accuracy depends on entering correct, realistic input values.

Is the Coulomb's Law Calculator free to use?

Yes, the Coulomb's Law Calculator is completely free, requires no signup, and runs instantly in your browser.