Ohm - Definition - Law Dictionary Home Dictionary Definition ohm

Definition :

Ohm, means a unit of electric resistance and is the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice 14. 4521 grammes in mass of an uniform cross-sectional area and of a length of 106.3 centimeteres. The aforesaid unit is represented by the resistance between the terminals of the instrument marked 'Government of India Ohm Standard Verified' to the passage of an electric current when the coil of wire, forming part of the aforesaid instrument and connected to the aforesaid terminals is in all parts of a temperature of 30'C. [Indian Electricity Rules, 1956, R. 2(1)(ag)]