Physics

Magnetic Force Between Current-Carrying Wires Calculator

Find the force between two parallel current-carrying wires.

Current 1 (A)

Current 2 (A)

Separation

Wire length

Calculated Output

Force (N) 0.002

Force per length (N/m) 0.002

Formula: F/L = μ₀·I₁·I₂ ÷ (2π·d)

Step-by-Step Breakdown

1. Values used:

2. Current 1 = 10 A

3. Current 2 = 10 A

4. Separation = 10

5. Wire length = 1

7. Force = 0.002N

8. Force per length = 0.002N/m

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The math behind it

F/L = μ₀·I₁·I₂ ÷ (2π·d). This relationship once defined the ampere.

10 A and 10 A, 10 mm apart, 1 m → about 2 × 10⁻³ N.

Attract or repel?

Same-direction currents attract; opposite-direction currents repel.