2. Power and Energy

By Sadasivan Puthusserypady, Technical University of Denmark, Denmark

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Published: 31 Mar 2021

© 2021 Sadasivan Puthusserypady


According to Physics, power is defined as the rate of doing work, it is the work done in unit time. Energy, on the other hand, is a quantitative property that must be transferred to an object in order for it to perform some work. Hence, energy is defined as the strength to do any kind of physical activity. Thus, energy is the ability to do work. Here, in this chapter, the following points are discussed in detail: • Definition and meaning of energy and power for signals, and computations of these quantities for typical examples of signals. • Detailed understanding of sinusoidal (real and complex) signals.