From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The calculation of inductance of a coil.
| Identifier | ExFiles\Box 34\1\ Scan015 | |
| Date | 28th December 1917 | |
| X 2512 CALCULATION OF INDUCTANCE OF COIL. Let impedance be Z ohms. and resistance be R ohms. Then reactance = X = √Z² - R² ohms. Reactance = pL = X L = X/p (dimensions LT⁻¹ / T⁻¹ = L) henries = ohms x seconds. (secohms). p = 262sec⁻¹ ∴ L = X/262 henries. | ||