MECHANICAL UNITS ELECTRIC AND MAGNETIC UNITS The esu and emu unit systems are cgs systems esu denotes “electrostatic unit”, sometimes given prefix “stat”, e.g. statcoulomb emu denotes “electromagnetic unit”, sometimes given prefix “ab”, e.g. abcoulomb Some emu units have special names:
The 11th CGPM (1960, Resolution 12) adopted a series of prefix names and prefix symbols to form the names and symbols of the decimal multiples and submultiples of SI units, ranging from 1012 to 10–12. Prefixes for 10–15 and 10–18 were added by the 12th CGPM (1964, Resolution 8), for 1015 and 1018 by the 15th CGPM (1975, Resolution 10), and for 1021, 1024,…