A speaker is the person (or animal or object, in some cases) who is telling the story. A speaker is essentially the same as a narrator because the speaker narrates the story.
The four Major tournaments, also incorrectly called the Grand Slams, are the most important tennis events of the year in terms of world ranking points, tradition, prize-money awarded, and public...
An open circuit is called open because the circuit has an opening, a disconnection. In other words, there is an open space in the circuit in which the electrons cannot move through.