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Capacitance increases and inductance increases b. Capacitance increases and inductance decreases c. Capacitance decreases and inductance decreases d. Capacitance decreases and inductance increases e. None of the above 7. The resonant frequency point is used to create filters that will eliminate: a. The resonant frequency b. All but the resonant frequency c. All frequencies higher than the resonant frequency d. All frequencies lower than the resonant frequency e. All of the above 8. What is the relationship between current, voltage, and power?

Develop a situation where you think that knowledge of the systems presented in this chapter would be helpful in your career. 10. Explain why it is important for a non-engineering professional to understand the material presented in this chapter. This page intentionally left blank Chapter 2 Basic Concepts of Electricity An appreciation and understanding of communications technologies is attainable without ever delving into hard-core engineering topics of physics and calculus. An understanding of the applied nature of the components of electricity, however, will give nonengineering professionals greater comprehension of the topics covered in this book.

Exhibit 4 shows a theoretical perspective of what an information signal and carrier signal may look like. The cycles per second graphical comparison in Exhibit 4 shows the difference in frequency between a signal and carrier. In AM frequencies, the signal is used to excite or modulate the carrier, and controls the amplitude of the signal, etching the information onto the carrier signal in an additive type of process. Exhibit 5 shows another perspective on the spectrum continuum of the difference between the baseband (signal) frequency and the carrier.

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Introduction to Communications Technologies - A Guide for Non-Engineers by S. Jones, R. Kovacs


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