Describe the costs and benefits of aliasing, and explain how it can be avoided

Choose the correct statements. Select one or more: a. Specific energy expressed with SI base units is J/K. Ob. Dynamic model of a measurement element with second order system dynamics can be expressed with block diagram using only scalar multiplication blocks. c. Feedback can make stable system unstable. Od. A Pl-controller is a controller with four parameters (proportional gain, integration time, derivate time and derivate filter). e. Second order system is a system that's step response oscillates when it have (underdamped) complex valued poles. Of. A thermocouple is one example of non-linear type of sensors. Og. Drift and non-linearity are wanted properties for sensors. Oh. Measurement uncertainty is only caused by external sources. Oi. A Bode diagram is a graphical representation of frequency response that consist of two separate plots (one for magnitude and other one for phase). Oj. A filter is one example of functionality that can be part of signal processing element.

Explain the term aliasing and discuss how it can be avoided indigital sampling.

Explain the key parameters or information that are obtained from a load flow study.