86 Views

Download Presentation
##### Chapter 1

**An Image/Link below is provided (as is) to download presentation**

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -

**EET 110 – Survey of Electronics**Prof Larry Strizich Fall 2009 Chapter 1**Summary**Passive Components Welcome to the Principles of Electric Circuits. You will study important ideas that are used in electronics. You may already be familiar with a few of the important parts used in electronic circuits. Resistors are introduced in Chapter 2. • Resistors**Summary**Passive Components Capacitors will be introduced in Chapter 12. • Capacitors**Summary**Passive Components Inductors will be introduced in Chapter 13. • Inductors**Summary**Passive Components Transformers will be introduced in Chapter 14. • Transformers**Summary**Active Components Passive components are used in conjunction with active components to form an electronic system. Active components will be the subject of future courses. • Transistors • Integrated Circuits**Summary**SI Fundamental Units Quantity Unit Symbol Length Meter m Kilogram kg Second s Ampere A Kelvin K Candela cd Mole mol Mass Time Electric current Temperature Luminous intensity Amount of substance**Summary**Some Important Electrical Units Except for current, all electrical and magnetic units are derived from the fundamental units. Current is a fundamental unit. Quantity Unit Symbol Current Ampere A Coulomb C Volt V Ohm W Watt W Charge Voltage Resistance Power**Summary**Some Important Magnetic Units All magnetic units are derived from the fundamental units. These units are discussed in Chapter 10. Quantity Symbol Unit Symbol Ampere-turns/meter At/m Weber Wb Tesla T Ampere-turn At Webers/ampere-turns-meter Wb/At.m Ampere-turns/weber At/Wb Magnetic field intensity H Magnetic flux f Magnetic flux density B Magnetomotive force Fm Permeability m ReluctanceR**Summary**Scientific and Engineering Notation Very large and very small numbers are represented with scientific and engineering notation. Example-1 47,000,000 = 4.7 x 107 (Scientific Notation) = 47. x 106 (Engineering Notation)**Summary**Scientific and Engineering Notation Example-2 0.000 027 = 2.7 x 10-5 (Scientific Notation) = 27 x 10-6 (Engineering Notation) Example-3 0.605 = 6.05 x 10-1 (Scientific Notation) = 605 x 10-3 (Engineering Notation)**peta**1015 P tera 1012 T 109 giga G 106 mega M k kilo 103 Summary Large Engineering Metric Prefixes Can you name the prefixes and their meaning?**10-3**milli m 10-6 micro m nano 10-9 n pico 10-12 p f 10-15 femto Summary Small Engineering Metric Prefixes Can you name the prefixes and their meaning?**Smaller unit**Larger number Summary Metric Conversions When converting from a larger unit to a smaller unit, move the decimal point to the right. Remember, a smaller unit means the number must be larger. Example-1 0.47 MW = 470 kW**Larger unit**Smaller number Summary Metric Conversions When converting from a smaller unit to a larger unit, move the decimal point to the left. Remember, a larger unit means the number must be smaller. Example-2 10,000 pF = 0.01 mF**Summary**Metric Arithmetic When adding or subtracting numbers with a metric prefix, convert them to the same prefix first. Example-1 10,000 W + 22 kW = 10,000 W + 22,000 W = 32,000 W Alternatively, 10 kW + 22 kW = 32 kW**Summary**Metric Arithmetic When adding or subtracting numbers with a metric prefix, convert them to the same prefix first. Example-2 200 mA + 1.0 mA = 200 mA + 1,000 mA = 12,000 mA Alternatively, 0.200 mA + 1.0 mA = 1.2 mA**Summary**Significant Figures Most work in electronics involves measurements, which always have error. You should report only digits that are reasonably assumed to be accurate. The rules for determining if a reported digit is significant are • Nonzero digits are always considered to be significant. • Zeros to the left of the first nonzero digit are never significant. • Zeros between nonzero digits are always significant. • Zeros to the right of the decimal point for a decimal number are significant. • Zeros to the left of the decimal point with a whole number may or may not be significant depending on the measurement.**Summary**Significant Figures Examples: Looking at the rule, decide how many significant figures in each of the examples, which are given with a rule: • Nonzero digits are always considered to be significant. 152.71 5 2. Zeros to the left of the first nonzero digit are never significant. 0.0938 3 3. Zeros between nonzero digits are always significant. 10.05 4 4. Zeros to the right of the decimal point for a decimal number are significant. 5.100 5. Zeros to the left of the decimal point with a whole number may or may not be significant depending on the measurement. 4 5100. As shown there are at least 2, but uncertain.**Selected Key Terms**Engineering notation Exponent Metric prefix Scientific notation A system for representing any number as a one-, two-, or three-digit number times a power of ten with an exponent that is a multiple of three. The number to which a base is raised. A symbol that is used to replace the power of ten in numbers expressed in scientific or engineering notation. A system for representing any number as a number between 1 and 10 times a power of ten.**Quiz**1. A resistor is an example of a. a passive component b. an active component c. an electrical circuit d. all of the above**Quiz**2. The electrical unit that is fundamental is the a. volt b. ohm c. coulomb d. ampere**Quiz**3. In scientific notation, the number 0.000 56 is written a. 5.6 x 104 b. 5.6 x 10-4 c. 56 x 10-5 d. 560 x 10-6**Quiz**4. In engineering notation, the number 0.000 56 is written a. 5.6 x 104 b. 5.6 x 10-4 c. 56 x 10-5 d. 560 x 10-6**Quiz**5. The metric prefix nano means a. 10-3 b. 10-6 c. 10-9 d. 10-12**Quiz**6. The metric prefix pico means a. 10-3 b. 10-6 c. 10-9 d. 10-12**Quiz**7. The number 2700 MW can be written a. 2.7 TW b. 2.7 GW c. 2.7 kW d. 2.7 mW**Quiz**8. The value 68 kW is equal to a. 6.8 x 104W b. 68, 000 W c. 0.068 MW d. All of the above**Quiz**9. The sum of 330 mW + 1.5 W is a. 331.5 mW b. 3.35 W c. 1.533 W d. 1.83 W**Quiz**10. The quantity 200 mV is the same as a. 0.000 200 V b. 20 mV c. 0.2 V d. all of the above**Quiz**Answers: 1. a 2. d 3. b 4. d 5. c 6. d 7. b 8. d 9. d 10. a