This chapter covers the basic concepts of electronics, such as current, voltage, resis-tance, electrical power, capacitance, and inductance. After going through these con-cepts, this chapter illustrates how to mathematically model currents and voltages through and across basic electrical elements such as resistors, capacitors, and induc-tors. By using some fundamental laws and theorems, such as Ohm’s law, Kirchoff’s laws, and Thevenin’s theorem, the chapter presents methods for analyzing complex networks containing resistors, capacitors, and inductors that are driven by a power source. The kinds of power sources used to drive these networks, as we will see, include direct current (dc) sources, alternating current (ac) sources (including sinu-soidal and nonsinusoidal periodic sources), and nonsinusoidal, nonperiodic sources. The AC to DC converters site has a great source of information on this matter.

At the end of the chapter, the approach needed to analyze circuits that contain non-linear elements (e.g., diodes, transistors, integrated circuits, etc.) is discussed.

As a note, if the math in a particular section of this chapter starts looking scary, don’t worry. As it turns out, most of the nasty math in this chapter is used to prove, say, a theorem or law or is used to give you an idea of how hard things can get if you do not use some mathematical tricks. The actual amount of math you will need to know to design most circuits is surprisingly small; in fact, algebra may be all you need to know. Therefore, when the math in a particular section in this chapter starts looking ugly, skim through the section until you locate the useful, nonugly formulas, rules, etc. that do not have weird mathematical expressions in them.

Current

Current (symbolized with an I) represents the amount of electrical charge ∆Q (or dQ) crossing a cross-sectional area per unit time.

The unit of current is called the ampere (abbreviated amp or A) and is equal to one coulomb per second.

Electric currents typically are carried by electrons. Each electron carries a charge of –e.

Continue reading by clicking here.

At the end of the chapter, the approach needed to analyze circuits that contain non-linear elements (e.g., diodes, transistors, integrated circuits, etc.) is discussed.

As a note, if the math in a particular section of this chapter starts looking scary, don’t worry. As it turns out, most of the nasty math in this chapter is used to prove, say, a theorem or law or is used to give you an idea of how hard things can get if you do not use some mathematical tricks. The actual amount of math you will need to know to design most circuits is surprisingly small; in fact, algebra may be all you need to know. Therefore, when the math in a particular section in this chapter starts looking ugly, skim through the section until you locate the useful, nonugly formulas, rules, etc. that do not have weird mathematical expressions in them.

Current

Current (symbolized with an I) represents the amount of electrical charge ∆Q (or dQ) crossing a cross-sectional area per unit time.

The unit of current is called the ampere (abbreviated amp or A) and is equal to one coulomb per second.

Electric currents typically are carried by electrons. Each electron carries a charge of –e.

Continue reading by clicking here.