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).
Calculation of the capacity of a condenser.
| Identifier | ExFiles\Box 34\1\ Scan014 | |
| Date | 28th December 1917 | |
| W.H. 235 a (100) T) (S.F. 575. 16-4-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2354. X.2512. 28.12.17. X2012 CALCULATION OF CAPACITY OF CONDENSER. Let capacity reactance be w ohms. w = volts/amps. = 1/pK (dimensions LT⁻¹) So that K = 1/pw farads. = 10⁶/pw mf. p = 2π f = 262 sec⁻¹ ∴ K = 3820/w mf. If volts = 205 amps. = C K = (3820 C)/205 = 18.6 C. If C be measured as volts on pocket voltmeter C = V/37.8 ∴ K = .49 V mf = .49 x reading. | ||