Which type of wave has both a gradual rise and an abrupt fall?

• A. Square wave
• B. Sinusoidal wave
• C. Saw tooth wave
• D. Pulse wave

Answer: (C)

The sawtooth wave is characterized by its distinctive shape, which includes a gradual rise followed by an abrupt drop. This form is reminiscent of the teeth of a saw, hence the name. During the gradual rise, the wave increases linearly over a given period, and once it reaches a peak, it falls sharply back to its starting point, ready to start the cycle again. This wave form is commonly found in various electronic applications, such as in sound synthesis and signal processing.

In contrast, the other wave types exhibit different characteristics. A square wave alternates between two levels with abrupt transitions, while a sinusoidal wave represents a smooth, continuous oscillation without any sharp transitions. A pulse wave consists of a brief high or low signal followed by a return to the baseline, lacking the gradual rise characteristic of a sawtooth wave. Understanding these differences helps in identifying the specific traits and applications of each wave type.