EVERYDAY SCIENCE

Detailed explanation-1: -A message encoded by changing the voltage of an electric current is called an electronic signal. The use of electric current for this purpose is known as electronics. Electronic signals may be analog or digital signals. Analog signals consist of continuously changing voltage in an electric circuit.

Detailed explanation-2: -Electronic components which can process the signals are called active components.

Detailed explanation-3: -Signal processing is an electrical engineering subfield that focuses on analyzing, modifying and synthesizing signals, such as sound, images, potential fields, seismic signals, altimetry processing, and scientific measurements.

Detailed explanation-4: -The basic components of an electronic communications system are the transmitter, communications channel or medium, receiver, and noise.