Mutual Inductance / Coupled Coil Calculator implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-136

Effect

Computation or source lookup only

Input and validation requirements

The specification leaves the handling of negative inductances, signed coupling coefficients, and invalid square-root arguments unspecified. It can also produce different results if the sign of k and the aiding/opposing switch are both used to encode winding orientation.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "L1": 0.004,
    "L1_unit": "H",
    "L2": 0.009,
    "L2_unit": "H",
    "k": 0.5,
    "connection": "series aiding"
  },
  "expected_outputs": {
    "M": 0.003,
    "M_unit": "H",
    "Ltotal": 0.019,
    "Ltotal_unit": "H"
  },
  "working": "M = k*sqrt(L1*L2) = 0.5*sqrt(0.004*0.009) = 0.5*sqrt(0.000036) = 0.5*0.006 = 0.003 H. Ltotal(aiding) = L1 + L2 + 2M = 0.004 + 0.009 + 2(0.003) = 0.004 + 0.009 + 0.006 = 0.019 H."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json