What type of wave form is produced by a rotary generator?

A rotary generator typically produces a sine wave output. This is due to the nature of how the generator converts mechanical energy into electrical energy. When the rotor of a rotary generator spins within a magnetic field, the motion causes a change in magnetic flux, which induces an electromagnetic force (EMF). This process leads to the generation of an alternating current (AC) that has a smooth, continuous oscillation.

The sine wave is characterized by its smooth periodic oscillation, which is ideal for most electrical applications, as it minimizes harmonics and power losses in the system. The sine wave output is also significant because it reflects the natural way that sinusoidal AC voltages behave in electrical systems, resulting in more efficient energy transfer and better performance in motors and other devices.

In contrast, other shapes like square, triangle, or half-wave forms have different characteristics, which may not be suitable for the applications typically served by rotary generators, hence why they are not considered correct outputs for this context. Additionally, square waves are characterized by their abrupt transitions between high and low states, while triangle waves have a linear rise and fall, neither of which align with the operational principles of a rotary generator.