What is the basic shape of the wave generated by a transmitter?

The basic shape of the wave generated by a transmitter is a sine wave because it represents the fundamental form of alternating current (AC) signals commonly used in communication systems. Sine waves are characterized by their smooth and continuous oscillation, which is critical for transmitting information effectively over radio frequencies. This wave shape ensures that the energy is transmitted efficiently and minimizes distortion, making it ideal for modulation processes.

Sine waves are the building blocks for more complex signals and are essential in understanding how various modulation techniques work, such as amplitude modulation (AM) and frequency modulation (FM). The other forms of waves, like square, triangle, and pulse waves, are used in specific applications but are not the natural oscillation pattern of a pure carrier wave as produced by most transmitters. They may introduce harmonic distortion and are typically used in digital signaling or specific signal processing applications rather than in the standard transmission of analog signals.