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Definition of ohm:

  1. The standard unit in the measure of electrical resistance, being the resistance of a circuit in which a potential difference of one volt produces a current of one ampere. As defined by the International Electrical Congress in 1893, and by United States Statute, it is a resistance substantially equal to 109 units of resistance of the C. G. S. system of electro- magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice 14. 4521 grams in mass, of a constant cross- sectional area, and of the length of 106. 3 centimeters. As thus defined it is called the international ohm.

Synonyms:

georg simon ohm.

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