Units, Practical

A system of units employed in practical computation. The absolute units, especially in electricity, have been found too large or too small, and the attempt to make them more convenient has resulted in this system. It is based on exactly the same considerations as the absolute system of units, except that multiples of the original fundamental units of length, ma , and time have been taken as the base of the new system. These basic units are multiples of the fundamental units. They are the following: The unit of length is 1E9 centimeters; the unit of ma is 1E-11 gram; the unit of time remains 1 second. While this has conduced to convenience in giving better sized units, micro and mega-units and other multiples or fractions have to be used. The following are the principal practical electric units: Electrostatic     Electromagnetic C. G. S Units.    C. G. S. Units. Intensity-Ampere equal to 3E9 1E-1 Quantity-Coulomb " 3E9 1E-1 Potential-Volt "         (1/3)* E-2         1E8 Resistance-Ohm "         (1/9)* E-11        1E9 Capacity-Farad " 9E11 1E-9 556   STANDARD ELECTRICAL DICTIONARY.