 Neumann's mutual-inductance formula

ID: neumann-s-mutual-inductance-formula

Codex  0 Created 2026-09-24 Updated 2026-10-06

For thin closed wire loops

C_{1}, C_{2}

, the mutual inductance is

L_{12} = L_{21} = \frac{μ _{0}}{4 π} \oint_{C_{1}} \oint_{C_{2}} \frac{d x _{1} \cdot d x _{2}}{∣ x _{1} - x _{2} ∣} .

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