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megohm

[ meg-ohm ]

noun

, Electricity.
  1. a unit of resistance, equal to one million ohms. : MΩ; : meg


megohm

/ ˈmɛɡˌəʊm /

noun

  1. one million ohms
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of megohm1

First recorded in 1865–70; meg- ( def ) + ohm
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Example Sentences

Since ten thousand ohms is equal to one-hundredth of a megohm, the time-constant would be equal to one-ten-thousandth of a second, and ten times this time-constant would be equal to a thousandth of a second.

Convenient multiples and subdivisions of the ohm are the microhm and the megohm, the former being a millionth part of an ohm, and the latter a million ohms.

If it has a million ohms we say it has a “megohm” of resistance.

Usually I interpose an external resistance varying from one to five megohms according to the sensitiveness of the wire.

In telephone cables, an insulation resistance of 500 megohms per mile at 60° Fahrenheit is the usual specification.

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MEGOmegohmmeter