What is Waveform
A plot or graph or shape and form of signal is obtained by plotting the instantaneous values of the quantity such as current and voltage with the frequency, against a base of time or angle is called Waveform. A waveform is the shape and form of a signal such as a wave moving in a physical medium or an abstract representation.
In many cases, the medium in which the wave propagates does not permit a direct observation of the true form. An instrument called an oscilloscope can be used to pictorially represent a wave as a repeating image on a screen.
To be more specific, a waveform is depicted by a graph that shows the changes in a recorded signal’s amplitude over the duration of the recording. The amplitude of the signal is measured on the y-axis (vertical), and time on the x-axis (horizontal).
Some AC waveforms are irregular or complicated. Square or sawtooth waves are produced by certain types of electronic oscillators, and by a low-end UPS (uninterruptible power supply) when it is operating from its battery. Irregular AC waves are produced by audio amplifiers that deal with analog voice signals and/or music.