Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] Introductory Circuit Analysis, 12/e Boylestad Chapter 14 The Basic Elements and Phasors

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] OBJECTIVES Become familiar with the response of a resistor, an inductor, and a capacitor to the application of a sinusoidal voltage or current. Learn how to apply the phasor format to add and subtract sinusoidal waveforms. Understand how to calculate the real power to resistive elements and the reactive power to inductive and capacitive elements. Become proficient in the use of a calculator to work with complex numbers.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] DERIVATIVE FIG Defining those points in a sinusoidal waveform that have maximum and minimum derivatives.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] DERIVATIVE FIG Derivative of the sine wave of Fig

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] DERIVATIVE FIG Effect of frequency on the peak value of the derivative.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RESPONSE OF BASIC R To A SINUSOIDAL VOLTAGE OR CURRENT FIG Determining the sinusoidal response for a resistive element. FIG The voltage and current of a resistive element are in phase.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RESPONSE OF BASIC L TO A SINUSOIDAL VOLTAGE OR CURRENT FIG Investigating the sinusoidal response of an inductive element. FIG For a pure inductor, the voltage across the coil leads the current through the coil by 90°.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RESPONSE OF BASIC C TO A SINUSOIDAL VOLTAGE OR CURRENT FIG Investigating the sinusoidal response of a capacitive element. FIG The current of a purely capacitive element leads the voltage across the element by 90°.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RESPONSE OF BASIC R, L, AND C ELEMENTS TO A SINUSOIDAL VOLTAGE OR CURRENT FIG Example 14.1(a). FIG Example 14.1(b).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RESPONSE OF BASIC R, L, AND C ELEMENTS TO A SINUSOIDAL VOLTAGE OR CURRENT FIG Example 14.3(a). FIG Example 14.3(b).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RESPONSE OF BASIC R, L, AND C ELEMENTS TO A SINUSOIDAL VOLTAGE OR CURRENT FIG Example FIG Example 14.7.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] FREQUENCY RESPONSE OF THE BASIC ELEMENTS Ideal Response FIG Effect of low and high frequencies on the circuit model of an inductor.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] FREQUENCY RESPONSE OF THE BASIC ELEMENTS Ideal Response FIG Effect of low and high frequencies on the circuit model of a capacitor.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR FIG Demonstrating that power is delivered at every instant of a sinusoidal voltage waveform (except v R = 0V).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR FIG Power versus time for a purely resistive load.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR FIG Determining the power delivered in a sinusoidal ac network.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR FIG Defining the average power for a sinusoidal ac network.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR Resistor Inductor Capacitor Power Factor

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR FIG Purely resistive load with F p = 1. FIG Purely inductive load with F p = 0.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR FIG Example 14.12(a). FIG Example 14.12(b).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] AVERAGE POWER AND POWER FACTOR FIG Example 14.12(c).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] COMPLEX NUMBERS A complex number represents a point in a two-dimensional plane located with reference to two distinct axes. This point can also determine a radius vector drawn from the origin to the point. The horizontal axis is called the real axis, while the vertical axis is called the imaginary axis.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] COMPLEX NUMBERS FIG Defining the real and imaginary axes of a complex plane.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RECTANGULAR FORM The format for the rectangular form is:

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RECTANGULAR FORM FIG Defining the rectangular form. FIG Example 14.13(a).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] RECTANGULAR FORM FIG Example 14.13(b). FIG Example 14.13(c).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] POLAR FORM The format for the polar form is:

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] POLAR FORM FIG Defining the polar form. FIG Demonstrating the effect of a negative sign on the polar form.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] POLAR FORM FIG Example 14.14(a). FIG Example 14.14(b).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] POLAR FORM FIG Example 14.14(c).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] CONVERSION BETWEEN FORMS Rectangular to Polar Polar to Rectangular FIG Conversion between forms.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] CONVERSION BETWEEN FORMS FIG Example FIG Example

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] CONVERSION BETWEEN FORMS FIG Example FIG Example

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] MATHEMATICAL OPERATIONS WITH COMPLEX NUMBERS Complex Conjugate Reciprocal Addition Subtraction Multiplication Division

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] MATHEMATICAL OPERATIONS WITH COMPLEX NUMBERS FIG Defining the complex conjugate of a complex number in rectangular form. FIG Defining the complex conjugate of a complex number in polar form.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] MATHEMATICAL OPERATIONS WITH COMPLEX NUMBERS FIG Example 14.19(a). FIG Example 14.19(b).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] MATHEMATICAL OPERATIONS WITH COMPLEX NUMBERS FIG Example 14.20(a). FIG Example 14.20(b).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] MATHEMATICAL OPERATIONS WITH COMPLEX NUMBERS FIG Example 14.21(a). FIG Example 14.21(b).

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] CALCULATOR METHODS WITH COMPLEX NUMBERS Calculators FIG TI-89 scientific calculator.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] PHASORS FIG Adding two sinusoidal waveforms on a point-by- point basis.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] PHASORS FIG (a) The phasor representation of the sinusoidal waveforms of part (b); (b) finding the sum of two sinusoidal waveforms of v1 and v2.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] PHASORS FIG Adding two sinusoidal currents with phase angles other than 90°.

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] PHASORS FIG Example

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] PHASORS FIG Solution to Example

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] PHASORS FIG Example

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] PHASORS FIG Solution to Example

Introductory Circuit Analysis, 12/e Boylestad Copyright ©2011 by Pearson Education, Inc. publishing as Pearson [imprint] COMPUTER ANALYSIS Multisim FIG Using Multisim to review the response of an inductive element to a sinusoidal ac signal.