What is the graphical representation of how signals change over time called?

• A. Waveforms
• B. Sine Waves
• C. Square Waves
• D. Voltage

Answer: (A)

The graphical representation of how signals change over time is called a waveform. A waveform is the plot of a signal’s amplitude versus time, showing its exact shape and timing. Sine waves and square waves are specific examples of waveforms, each with distinct shapes. Voltage is the quantity that can be plotted as a waveform, but it’s not the representation itself. So the graph you see with time on the horizontal axis and the signal’s value on the vertical axis is a waveform.