Dictionary

megafarad en · NOUN

Etymology

From mega- + farad.

Meanings

1. (obsolete) A unit of quantity of electric charge; the quantity of electricity flowing through a one megohm resistor when driven by an electromotive force of one volt for one second.
   • What is the work done by a current of 5 Megafarads per second through a resistance of 10 Ohms? 1874, Josiah Parsons Cooke, Principles of Chemical Philosophy, page 575:
   • […] when electrotyping, electric light, &ᶜ become commercial we may perhaps buy a microfarad or megafarad of electricity […] 24 August 1872, William Thomson, 1st Baron Kelvin, letter to James Clerk Maxwell
   • (6.) How many megafarads are contained in 5.32 metre-gramme-second units of current? 1876, Richard Evan Day, Exercises in Electrical and Magnetic Measurement, with Answers, page 45:
2. An improbably large unit of electrical capacitance equal to one million farads.
   • Because of MF (now correctly the symbol for the massive megafarad) and mf having at some time been common symbols for microfarad, the millifarad (correctly mF) is rarely referred to […] 2002, Donald Fenna, A Dictionary of Weights, Measures, and Units, page 87:
   • 34. The capacitance unit of convenient size is (a) farad (b) microfarad (c) kilofarad (d) megafarad 1997, Mahesh Jain, S. Chand's Objective Physics for Engineering and Medical Entrance Examinations, page 857:
   • Tomorrow he'd be sentenced to death by electrosheet, and couple of weeks after that, they'd put him in the electrocell with the two metal walls that were a megafarad capacitor, and then the great sheet of electricity would flash across, and then a janitor would come in and sweep Willy's ashes into a little plastic box to give to Mom and Dad. 2015, Rudy Rucker, The Ware Tetralogy, page 345:

Forms

Translations (3)

de Megafarad (a unit of electrical capacitance equal to one million farads) · fr mégafarad (a unit of electrical capacitance equal to one million farads) · it megafarad (a unit of electrical capacitance equal to one million farads)