Signal
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Example:
Imagine trying to adjust the volume on your TV remote to find the perfect sound level that suits everyone in the room. This process is similar to a varying electric current that represents information because just as you adjust the volume to convey the optimal level of sound, a varying electric current changes to represent different pieces of information. In this analogy, the remote control's volume adjustment is like the electric current varying its intensity, and just as it communicates the right sound level to your ears, the electric current conveys the necessary information to an electronic device.
Practice Version
Signal: A varying electric current that represents information. Signal. In science, a signal is a way to transmit information from one place to another, often using waves or electrical impulses.