Equations · equation
Transformer Equation
Electromagnetism · 1885
- Equation
- V_s/V_p = N_s/N_p
- Field
- Electromagnetism
- Symbols
- V_p, V_s primary and secondary voltage · N_p, N_s turns on each winding
- Year
- 1885
Significance
Two coils on one iron core, and the voltage steps by the ratio of their turns — with almost nothing lost, which is why alternating current won: step up to hundreds of kilovolts, send it across a country with small losses, step down at the other end. Faraday's law made practical.
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