A time interval equal to ./math/texvc '/var/www/htdocs/www/newtermwiki/cache/math' '/var/www/htdocs/www/newtermwiki/cache/math' ' sqrt{360} ' 'utf-8' math_unknown_error of the time required for one complete cycle of alternating current. Mechanical rotation is often measured in degrees, 360° constituting one complete revolution. In describing alternating voltages and currents, the time for one complete cycle is considered to be equivalent to 360 electrical degrees (360°) or 2π electrical radians. For example, if the frequency f is 60 cycles per second (60 Hz), 360° corresponds to 1/√60 second and 1 electrical degree to 1/√21,600 second.