German physicist who formulated Ohm's Law ( 1787- 1854)

a unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere

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.

The unit of electrical resistance, equivalent ot the resistance of 400 feet of common iron telegraph wire; from Georg Simon Ohm ( 1787- 1854), German physicist.

The unit of resistance in galvanic electricity.

98.- Mesco loop- ohm Head Set Fig. – The Radio Amateur's Hand Book by A. Frederick Collins