Much depends on the point at which we decide that RP came into existence. William Gladstone, who was PM for four different terms in the late 19th century, went to Eton College yet his pronunciation gave away that he was from the North of England and his speech was criticised by RP speakers in the early 20th century.
Definition of vane. 1a : a movable device attached to an elevated object (as a spire) for showing the direction of the windb : one that is changeable or inconstant.
Total harmonic distortion, or THD, is the summation of all harmonic components of the. voltage or current waveform compared against the fundamental component of the voltage. or current wave: The formula above shows the calculation for THD on a voltage signal.herefore it is important to gauge the total effect of these harmonics. Thesummation of all harmonics in a system is known as total harmonic distortion (THD).This paper will attempt to explain the concept of THD and its effects on electricalequipment.